My weapon was http://www.wowhead.com/?item=40406 Inevitable Defeat
and I took
http://www.wowhead.com/?item=39758#comments The Jawbone
Now, I am a Blood tank, so i have 6+5 expertise by default.
Now, my gear stats are the following:
1. 40k hp raid buffed (Not vamparic blood)
2. 27% dodge
3. 22% Parry
4. 8.75% expertise
TBH with my guild's insane dps I decided i'll roll need on jawbone because I do struggle sometimes to keep my aggro, and it will only get worse the closer we get to Uludar (the more geard the dps will be) I currently have best of the best tanking gear and rings / trinkets except my helm is still heroes.
anyway, Jawbone vs Defeat = I lose:
-12 stamina
-0.75% Expertise
-0.65% Dodge
What I gain with jawbone is 49 more dmg.
Now, i say it's worth it.... My GM doesn't, so what do you say ? Show me some math of you can, because he asked for..