I am going the corpselance support build for Necromancer and the build has me taking Corpselance with Brittle and the pestilence set on top of that, if I were to take off the ability Corpselance and change it to another ability say for example Bone Spikes with Frost spikes, would the damage decrease an amount that it would not be worth it?

Alright my first build... Here we go!
Now Necromancers aren't my 'main' classes but i play with them and im pretty good with them. And i come up with a build that is a bit boring, but ultra powerful, so lets begin!
1. Primary Attack, Primary attack should be bone spikes with the rune: Path of bones or Blood spikes. Why? Blood spikes are for people that lose health really quickly, and the blood spikes allow you to heal over the bleeding enemies you hit. Path of bones on the other hand is for people who have a lot of enemies in your way. Or you can have no rune, which i mildly recommend for people who are already strong just want to be a bit stronger :))
2. Secondary Attack. Should be Bone spear with the rune: Teeth or Blighted Marrow. Teeth is the one that i recommend for most people to use, why? Teeth fires more bone spears trough enemies, of course it deals not much damage but it damages more enemies. Plus, you can get an achievement for killing 40 enemies with bone spear within 3 seconds. Bligthed Marrow is for people that like to stay behind their minions and just fire their bone spear trough enemies. I call this build the lazy one. 
3. Corpses. Should be using Corpse Lance with the rune: Ricochet. Why? Ricochet allows you to have an chance to hit one more bonus enemy when you attack the first one. Which is pretty good.
4. Reanimation. Should be Command Skeletons with the rune: Kill Command,Frenzy and Dark Mending. Kill command is for people who are confident without their minions and want ther minions do yeet themself to enemies and kill them in one shot. Frenzy is the one that i recommend the most, this will allow you to command your skeletons to gain attack speed (which means more damage to the enemy) and it's just really that powerful. And Dark Mending is the last one. Dark mending is for people who lose health pretty quickly and want their minions to heal them.
5. Curses. Either Frailty or Leech. Frailty is for people who want their minions to deal much bigger damage with the rune: Scent of Blood. Why? Scent of blood will allow your minions to attack 15% increased damage, which is really helpful if you want your minions to do the job and not you. Leech is for people that lose a lot or a bit of health. With the rune Sanguine End. Cause it will allow you to heal 200% for the enemies that die.
6. Blood and Bone. This should be RIGHT OF THE BACK bone spirit with the rune: Poltergeist. Why? Bone spirit is powerful as heck and you should use it immediately when you get it. The rune Poltergeist will allow you to have 4 bone spirit, which means EVEN MORE DAMAGE THEN BEFORE HAHA.
7. Passive skills. I recommend: Overwhelming Essence for people that want more Essence and use a lot of Essence now and then. Spreading Malediction is for people that want their curses to deal a lot more damage, well not much but 1% increased damage is at least okay. Serration is also a really good passive skill, Serration is for people that like to stay behind while their minions do their business and you like to stay behind and just shoot bone spikes at them. And finally Aberrant Animator. For people that like to increase the thorns damage for their minions
And that's it! Took me a lot of time, and some repilies and thanks would be appreciated. And yeah, hope you are good with your necromancer now!
OH sorry if the text is black! I didn't realize that it would be hard to read on my post, cause when i m editing it looks white so... sorry :((

I usually sim my characters to get the best possible results. I enjoy the process quite a lot and since I reached 120, I wanted to find out the best build of the spec. (Note, I didn't want to find out what to play, but rather how my own build fares in comarison.) I rarely mind a 1-2% difference. If it goes above 2%, I really mind a change. What this thread is about is mainly to bring something in the attention of those who help making the class guides, especially the talent choices. To my surprise, I was awed to find out that certain talents outperform previous "Standard" choices in the endgame, probably due to the stat squish.

The Frost go-to build (top dps) would probably be along the lines of <Icy Talons / Cold Heart - Runic Attenuation - Frozen Pulse - Gathering Storm - Breath of Sindragosa>. What I found out primarily was that after the removal of legendaries, Cold Heart severely underperforms at most given situations resulting in a major dps drop due to the low mastery. Gathering Storm also suffers from the same problem and most of the times, Frostwyrm's Fury is better overall. The biggest surprise of them all, however, was that Inexorable Assault overperforms quite a lot, and is the first reason why I made the topic. I then started simming with the above in mind and I came across a build that some would not consider on par with top dog builds around the meta, which is the use of Horn of Winter which overperforms both its other two options when using the Breath build. Talent Sim can be seen here. Another intresting thing, which I loved, was that the 2nd best build uses Obliteration as a lvl 100 talent and no other build surpassed it (Other than the first one, obviously). So, I encourage frost players out there to give their other, less common talents a try. To the class guide author(s), I believe that the two "underdog" talents will earn their spot in the class guides.

Thank you for your time reading this.


 

1. Introduction
The LoN Rapid Fire grenade build hinges upon the the effects of The Wailing Host and Litany of the Undaunted`s Set bonus and the power of Wojahnni Assaulter combined with the ability to channel forever with the Sin Seekers 
 
2. Build
                                                                  Primary skills
Rapid FireBombardment Marked for DeathContagion VaultTumble Fan of KnivesBladed Armor PreparationInvigoration VengeancePersonal Mortar                                                                                                                 Secondary skills
Grenadier Perfectionist Thrill of the Hunt Awareness 3.1 Gear Setup
Helm:Visage of Gunes Shoulders:Mantle of Channeling Gloves:Magefist Chest:Aquila Cuirass Belt:Hellcat Waistguard Pants:Pox Faulds Boots:Boots of Disregard Bracers:Krelm's Buff Bracers Amulet:Hellfire Amulet of Dexterity Ring 1:The Wailing Host Ring 2:Litany of the Undaunted Weapon:Wojahnni Assaulter Offhand:Sin Seekers 3.2 Legendary Gems
Legendary Gem 1:Bane of the Powerful Legendary Gem 2:Bane of the Trapped Legendary Gem 3:Molten Wildebeest's Gizzard 3.3 Kanai's Cube
Weapon slot: Dawn Armour slot:St. Archew's Gage Jewelry slot:Obsidian Ring of the Zodiac

Hi,
This build suggestion is intended to comply with the guidance in:
What is the main part of the build? What does it rely on to work?
This is a speedfarming variation of the "Lazy Necro (i.e. The Anti-Carpal Tunnel Build)" build found at https://www.diablofans.com/builds/93271-lazy-necro-i-e-the-anti-carpal-tunnel-build-2-6-1, sometimes called the "Lazymancer" build. That build's rationale and synergies are discussed at https://us.battle.net/forums/en/d3/topic/20758385950. Basically, you just keep moving and most normal mobs you touch die. Very little thought or effort is required, other than casting Bone Armor periodically, Devouring frequently, and dealing with Champions, Elites, and Rift Guardians.
It is intended for paragon and gear levels such that T13 content is trivial. I typically run GR60s for leveling low-level gems up to level 50, then increase the level one at a time up to 70, bringing the gems to level 60, and also use this build for bounties and LRs. I can use this build above GR70 but it gets slower, and more powerful builds end up making more sense even though they require more concentration and effort.
I'm at 983 PP, all Ancient, one Primal, all pieces modestly Augmented, typically with +350 int. This build was, in fact, crucial to getting everything augmented, because I can run GR60s so quickly and level gems up to 50, then switch to more powerful, slower builds to run up to GR80 and level gems up to 70. In the past I used PPs for Vitality and gemmed for Vitality. At this point I use PPs for Int and gem for Int. In some cases I have played with friends/in groups and gotten the gems I use and the gems for augments to higher levels.
I'm not sure of my average rift-clearing time. For this post I tested and cleared GR60s in 3:38, 3:52, and 2:58.
Compared to the build it is based on, my proposed build remains based on the Inarius set (Inarius's Conviction, etc.) and Bone Armor as enhanced by the Inarius set bonuses. The major important changes are:
Cubing Krelm's Buff Belt rather than Aquila Cuirass for speed; I find that I don't need the damage reduction, especially given the Gizzard as noted below.
  Substituting out one of the DOT gems (Pain Enhancer or Gem of Efficacious Toxin) for Molten Wildebeest's Gizzard to prevent damage and thus keep the speed bonus from Krelm's Belt active, and also increase life per second.
  Substituting Death NovaBlight for Land of the DeadFrozen Lands for use on Champions, Elites, Rift Guardians, and crowds.
  Changing passives from:

 Stand Alone, Rigor Mortis, Eternal Torment, and Draw Life 

to:

 Stand Alone (unchanged; great value in a petless build), Final Service (survivability; permit carelessness, especially around explode-after-death mobs; avoid losing a gem upgrade), Overwhelming Essence (more Death NovaBlight when needed; extra damage due to Reilena's Shadowhook), and Fueled by Death (speed). Minor changes include:
Equip:

The Traveler's Pledge and The Compass Rose (take less damage while moving, which is almost all of the time; do more damage when standing still, when casting Death Nova repeatedly against Champions, Elites, and Rift Guardians; plus, I happen to have a really nice primal Compass Rose) and Krysbin's Sentence (cubed in the base build)

... rather than:

Wisdom of Kalan (I cube it instead), Bul-Kathos's Wedding Band (I don't find that I need the Draw Life, especially with the  Molten Wildebeest's Gizzard shield and life regen, plus the Endless Walk damage reduction; also, no room), and Convention of Elements (no room).
  As noted in passing above, cube Wisdom of Kalan so I can wear The Traveler's Pledge. Provide as many items as possible that you feel the build requires. If you aren't sure about a certain slot, leave it empty and let the community fill it in with suggestions.
6p Inarius set:
Inarius's Understanding Inarius's Martyrdom Inarius's Conviction Inarius's Will Inarius's Reticence Inarius's Perseverance Other:
The Traveler's Pledge (rationale discussed above) The Compass Rose (rationale discussed above) Krysbin's Sentence (increased damage due to self-proccing Bane of the Trapped as well as Bone ArmorDislocation and Death NovaBlight) Nemesis Bracers (Greater rift-clearing speed by spawning a champion at every shrine; can substitute e.g. Reaper's Wraps (which have the advantage of being crafted; thus, you can keep crafting them until you get the stats you want) for bounties Dayntee's Binding (damage reduction due to FrailtyAura of Frailty) As is Recommended in the base build, I use Reilena's Shadowhook and cube Trag'Oul's Corroded Fang. Presumably, as is listed as Adequate in the base build, it would be fine to use Trag'Oul's Corroded Fang and Lost Time and cube Reilena's Shadowhook. Provide as many skills as possible that you feel the build requires.
SimulacrumReservoir for rift bosses or bounty bosses. I bind this to mousewheel up. FrailtyAura of Frailty so things die faster; also, for damage reduction due to Dayntee's Binding. I bind this to left mouse button, so the left mouse button just causes me to move, it never casts anything. Bone ArmorDislocation because of the benefits from the Inarius set. This is your principle damage dealer. The Dislocation stun procs Krysbin's Sentence for additional damage. I bind this to mousewheel down. DevourCannibalize for the essence, life, and the speed increase via Fueled by Death. I bind this to the G8 button on my Logitech G700. The Back button on a standard 5-button mouse would also be a good choice. You need to hit this quite often, trying to keep up ten stacks of Fueled by Death as well as your health and essence. Blood RushMetabolism for mobility. I bind this to the G6 button on my G700. the Forward button on a standard five-button mouse would be another good choice. Great for hopping through walls, hopping up/down to/from balconies, and returning from dead ends. Death NovaBlight for Champions, Elites, and Rift Guardians, and for clearing bunches of mobs without running around and touching them all, and to proc Krysbin's Sentence. I have this bound to the right mouse button. Add a general overview of the playstyle. Should you be hanging around at the back or diving in? Should you be spamming abilities or pooling resources?
This is a tanky necro. As long as you have 15 stacks of bone armor up, and especially if the shield from the Gizzard is up, wade right in. Avoid the explosions when some mobs die, but sometimes I take a chance on this as long as Final Service hasn't been used in the last 60 seconds; I don't want to wait for the explosions to gather orbs, and so sometimes I get caught in explosions which would have resulted in death without Final Service.
You must get bone armor up right away. It does full damage even with one stack. You should try to get it to 15 stacks as soon as possible. It is really annoying when you initially encounter just a few mobs and get a correspondingly small number of stacks of bone armor, and you can't get more until the ten second cooldown passes. In these situations, consider just blood rushing past the small number of mobs to get to a larger number of mobs so that you can start with more bone armor. 
Once you have 15 stacks, you only need a single mob to maintain all 15 stacks when you recast, but you do need to recast (and you need a live mob) before it expires. You must recast after the ten second (before CDR) cooldown, and before the 60 second expiration. Ideally recast when there are a bunch of mobs, and/or an enemy elite/champion/rift guardian around; there is a significant boost in damage to nearby mobs when you recast. Generally recast soon after the cooldown. If you have a follower with an Oculus Ring, it's great to recast while standing in an Area of Focused Power.
If you die during e.g. a GR rift guardian and there is thus only one mob available to rebuild bone armor, you will be squishy and need to kite. Cast bone armor on cooldown; when you haven't taken damage for four seconds and the shield from the Gizzard gem shows up, wade in and get some hits and apply a DOT. Also, you will have no way of recovering Essence; make sure you have Simulacrum up when you cast Death Nova, and don't do it until you have enough stacks of Bone Armor that you can keep casting until Essence is exhausted while Simulacrum is still up.
I only use Simulacrum on rift guardians or bosses during bounties. You could probably use it more often.
Cast Devour often. Try to maintain ten stacks of Fueled by Death. As with Bone Armor, once you have ten stacks, you only need to consume a single corpse to maintain the ten stacks.
For solo play, I use the templar because of the life-per-second from Loyalty, which enhances the Gizzard. I equip him with Enchanting Favor so I don't have to care about vitality, resistance, etc., and can concentrate on CDR and AS (for equipment procs), Thunderfury, Blessed Blade of the Windseeker with Lightning damage plus the Legendary power because I used to play WoW (well, actually, because of the lightning damage, to proc his ring), The Ess of Johan to gather mobs so I can run through them, maybe casting Bone Armor or a Death Nova, Wyrdward to stun enemies via lightning damage (and thus proc my Krysbin's Sentence), Oculus Ring to dramatically increase my damage when it's convenient to blood rush (or just walk) into an area of focused power and recast Bone Armor and/or cast Death Nova, and Freeze of Deflection to freeze attackers occasionally, again proccing my Krysbin's Sentence. Skills are largely up to you, other than the previously-stated advantage of Loyalty; I use Intervene, Charge, and Inspire (I don't want the knockback from Guardian; I want mobs clustered together).
What stats work best for the build?
Enough Vitality to run the content at your paragon/gear level. Otherwise, Intelligence for faster killing (and Resist All). CHC is particularly important if you want to use Pain Enhancer as your DOT gem; it does its damage over just three seconds, but only to mobs you critically hit. If your CHC isn't high enough, use Gem of Efficacious Toxin. It takes ten seconds to do its work, but it doesn't require crits and it benefits from +Poison Damage. CHD is a big damage boost. +Poison Damage affects both your bone armor and your death novas. +Bone Armor damage is nice. Life per Second enhances the shield from the gizzard.
Where should you be putting paragon points?
Mostly this is a late-game build, so you'll have topped out or nearly topped out everything except Intelligence and/or Vitality. There, put enough in Vitality to stay alive and safe; put the rest in Intelligence. When I started running this build I used PPs and gems primarily for Vitality. Once I got augments on everything and mobs died faster I moved toward Intelligence.
What gems and legendary gems should you be using?
For helm, amethyst seems like the only sensible choice. For weapon, an emerald via a Ramaladni's Gift. For jewelry, Molten Wildebeest's Gizzard, Bane of the Trapped, and either Pain Enhancer or Gem of Efficacious Toxin as discussed above. For the remaining sockets, amethyst or topaz depending on your survivability needs, as discussed above.
What should be in your Kanai's cube?
As discussed above, either Trag'Oul's Corroded Fang or Reilena's Shadowhook, depending on which is equipped, Krelm's Buff Belt, and Wisdom of Kalan unless you're wearing it, in which case you could cube Krysbin's Sentence and wear something like Bul-Kathos's Wedding Band or Convention of Elements instead.
I hope others find this useful.