Hello all rogues in Azeroth. I'm a 915 assasination rogue. Can pull 1,5m burst dps and substain around 700-900k dps during longer fights. 
Since my question is about relics I don't feel the use of armory and logs to answer my question. 
My weapon is ilvl 920 and I feel it's falling behind with my raidpartners and I'm thinking of when to switch out what I'm using. Since I'm using two master assasin + boots my vendetta is on around 45 sec CD
I have: 
shadow: 905 toxic blade relic.
Iron: 885 master assasin relic.
Blood: 900 master assasin relic.

Should I focus more on ilvl with for example Iron-relic? 
See you around and remember. If someone scary comes. Vanish, shadowstep, Mutilate 

Ok so let me start out by saying my weapon is lvl 885(fire artifact) and has the following relics equipped: 

Fires of Heaven 855 +10% Pyro (Fire)
Raven's sight 865 +20% FS (Arcane)
Fires of Heaven 845 +10% Pyro (Fire)
(I know it doesnt add 10% each)

i have in my bag i have:

Seawitch's Foci 840 +12% Ignite (Arcane)
Sizziling Fang 875 +12% Ignite (Fire)
Soulforge Ember 835+12% Ignite (Fire)
Molten Giant's Eye 860+3% Fire crit (Fire)
Fires of Heaven 840 +10% Pyro (Fire)

Ok last time i took out an Ignite relic i lost 40-50k dps. I put in the 855 Fires of Heaven relic and just did not stack up even though it was a 10ilvl increase. So my question is should i go tripple Ignite? or maybe double ignite with the crit relic too. I care a lot more about mythic + dps more than raid so keep that in mind. it doesnt seem like the pyro one is very good compared to ignite. Also if anyone can offer an explanation as to why i lost so much dps by switching in the supposedly best relic (pyro) that would be great. My best guess is that i was on some kind of soft cap with mastery and that it did a lot more dps but idk

I think the best two options are running three ignite for insane cleave damage in mythic plus or, Sizziling Flame, Molten Giant, and Seawitch.

Here on Icy Vein's under the Arms Warrior DPS guide here is the recommended relic choice. I was under the impression that [Exploit the Weakness] was our top priority even if it meant 20-25iLvl difference. Since it would increase the proc chance by a factor of x2 with all three relics increasing Tacticians...
Why does this guide on Icy Veins say otherwise? Is it because the information is out of date and hasn't been updated?
 
(Original Link: https://www.icy-veins.com/wow/arms-warrior-pve-dps-artifact-talents-traits-relics)

 
Unfortunately this is not someting I can just run a Sim on because I don't currently have any [Exploit the Weakness] relics.

Which is better an 865 relic with Firestorm: http://www.wowdb.com/spells/191740-firestorm#related:improved-by or an 865 relic with Earthen Attunement: http://www.wowdb.com/spells/191598-earthen-attunement?artifactRank=1
http://us.battle.net/wow/en/character/uldaman/Demonicka/simple

I am in need of help. My Doomhammer is currently on 887 itemlevel. From this weeks world boss I got 860 ilvl "Calamir's Jaw" which gives "Each target hit by crash lightning increases damage dealt by my next stormstrike by 2%. (which is semi ok).
BUT my current one is a 850 ilvl "Torch of shaladrassil" with 10% increased attack speed when stormstrike proccs.
So the question is, do I switch to the 860 ilvl one? It boosts doomhammer from 887 to 890. BUT i loose 10% attack speed. goes from 40% to 30%. Is it worth it? I feel stormstrike proccs alot and the attackspeed is very useful.
Regards
Feelpain-Ravencrest