So far I have been stacking avoidance. I am around 45% dodge+parry and 17% shield block.
But I see some high end tanks that are around 40% dodge+parry with much higher shield block, more like 27%
I'm sure they know what they are doing, but I don't understand it. If a block mitigates on average 25% of the damage from a hit, then you would need 4x the shield block to match an equivalent amount of dodge/parry.
So why would you give up 5% avoidance to gain 10% block rating? You would obviously be taking more damage (save for fights with very weak hitting bosses, like Loatheb). What am I missing here?
You have to look at the person's gear. Does it look like they are intentionally stacking block rating? Does it look like a "main tank" set? Maybe it was just a trash set with block rating on.
Maybe they haven't had gear drop that isn't covered in block rating. There's a billion trillion variables that can cause someone's gearing to change.
I have an extremely high block rating set that I use for trash and some other fights, it's like 23/21/40 for dodge/parry/block totals. Nearly done with that set, which I'd be at 102.4% coverage with when completed (and raid buffed).
You're right, Block rating is inferior to actual avoidance in nearly every situation, and you're also aware of when block rating can be genuinely useful or better.
However, tanks do not yet possess an ability that lets us yell at our gear to change its stat allotment. As much as I'd love to shout at a Wall of Terror - Item - World of Warcraft and tell it to not suck so much and to change its stats RIGHT NOW so I can use it, it doesn't work.
I personally don't understand why anyone stacks block rating unless you're tanking trash. I run about 20% dodge, 20% parry, and 15% block rating when I tank bosses. But I also have 254 hit and 36 unbuffed expertise for boss fights. The threat you gain from stacking hit and expertise will far exceed what block rating gives you through damage shield and rage. In my trash tanking gear I have 40% block rating, 20% dodge, and 20% parry.
so what this means is that when (hit size < block size):
1 block rating = 2.39 dodge rating
When (hit size = block size x 2):
1 block rating = 1.195 parry rating
When (hit size = block size x 5):
1 block rating = .478 dodge rating
Please feel free to elaborate and retaliate as necessary. I'm not factoring Glyphs or Shield Block ability in my quick and dirty example, but those obviously favor block.
On a side note, Wall of Terror ain't that bad. I believe it's still the top mitigation shield for hit sizes under 6kish but I need to do some math for that. It also provides significantly more AP then any other shield, and has the 2nd highest SBV.
Last edited by Myzery; 01-09-2009 at 12:32 PM.
Reason: multiple gearsets ftw
Actually, I did think of a reason why shield block is good.
If you shift from dodge/parry to block rating, on most fights you will end up taking more overall damage. But that damage will be less spiky.
The higher a warrior pushes their pure avoidance stats, the more we risk a long string of misses, leading to rage starvation and losing threat. Blocking instead of dodge/parry makes for a more steady stream of incoming rage.
Steady damage is also easier on your healers, even if it is more damage overall.