delicate vial- is it really this bad?

[nicarlitos 13]

This trink dropped for me off a bonus roll on Animus last night.

http://www.wowhead.com/item=94518

On face value, it looks alright- 8.8k mastery proc for 20 seconds and the potential to stack 3 times. Seemed tidy.

I decided to equip it, what with it being all shiny and new, and we want on and killed Qon and twins without issue. I don't think I saw one proc. Not even from trash.

I'm not one to even attempt theorycrafting....but I think for a DK tank (not reforging or gemming into dodge), this is a terrible trinket. I reckon that I might get 1 proc in 10 minutes of tanking a boss.

Here's my workings and assumptions. I'm in no way a theorycrafter, so these may be way off, but hopefully close enough to illustrate how bad this thing is.

Boss swing rate 0.5 per second
  
Dodge chance 10% (close enough)
  
Proc rate for trinket 4% change on dodge 
  
  
Fight length 5 minutes
  
Boss swings 150 (5 * 60 * 0.5)
  
Dodged swings 15 (150 * 10%)
  
Procs 0.6         (15 * 4%)

So, in 5 solid minutes of single target boss tanking there's a 60% chance of getting 1 proc. Factor in tank swaps and times when the boss doesn't melee....then this can only drop.

For fights with lots of adds, I would assume the proc rate would go up....but still seems very weak. I guess I'll go back to the liquid courage!

Anyway....any thoughts appreciated here before I dump this in my bank and forget about it.

Cheers,
Nic

[Storm 426]

This trinket would have been much more useful to us if it had Parry, and also activated on Parries.

 

You are basically correct that our chance to proc with this trinket is way too low for it to be useful on a single boss fight, but it could possibly have some uses fights with a lot of adds. For example on Tortos if you are bat tanking then you would have a higher probability of getting procs, but I'm still not sure even that would be very good. I think there are about 8 bats that come down each time? and they're alive for maybe 15 seconds on average, and we'll say there are about 5 waves of bats for an average raid group.

 

So, some estimation / rough math:

8 bats * 15 seconds * 5 waves * 0.5 attacks per second = 300 hits

10% chance to dodge = 30 dodged attacks

4% chance to proc = 1.2 procs per fight on average.

 

That's still pretty bad.

 

You would need at least 30% dodge before the proc rate would become useful so it's basically useless for any plate tank, and the mastery proc is useless for a druid tank. so really the only class this trinket may be good for is a Monk.

[Tyrendorf 1]

I would use it in Tortos fight for bat tanking with Relic of Niuzao, only due to the passive dodge. The proc is bad, but i can't handle mastery well in this role too.

[Tarazet 144]

It's much better for dodge tanks - Monks and Druids. At a 50-60% dodge chance you start to see a decent proc rate. But even then, we only use it on situations like heroic Tortos bats where the effective health boost is useful, because we prefer either Agility/Crit or Stamina trinkets.

[Tarazet 144]

This trinket would have been much more useful to us if it had Parry, and also activated on Parries.

 

You are basically correct that our chance to proc with this trinket is way too low for it to be useful on a single boss fight, but it could possibly have some uses fights with a lot of adds. For example on Tortos if you are bat tanking then you would have a higher probability of getting procs, but I'm still not sure even that would be very good. I think there are about 8 bats that come down each time? and they're alive for maybe 15 seconds on average, and we'll say there are about 5 waves of bats for an average raid group.

 

So, some estimation / rough math:

8 bats * 15 seconds * 5 waves * 0.5 attacks per second = 300 hits

10% chance to dodge = 30 dodged attacks

4% chance to proc = 1.2 procs per fight on average.

 

That's still pretty bad.

 

You would need at least 30% dodge before the proc rate would become useful so it's basically useless for any plate tank, and the mastery proc is useless for a druid tank. so really the only class this trinket may be good for is a Monk.

 

The mastery proc isn't so bad for bears. It's enough with 3 stacks to push to armor cap, and 70% (in my current gear) to 75% damage reduction means instead of a 10k (before mitigation) attack hitting for 3k, it will hit for 2.5k, which is a 16% reduction - nearly a Barkskin.

Edited August 7, 2013 by Tarazet