Originally Posted by
Gaidax
You overestimate the belt quite a bit, it's definitely nice but it's not like ooo00o0o0oOOoo0oooOO as you suggest, if you do 240k DPS without it, you would do 270k with it. The bonus itself is about 8-10% boost at best, very nice, but not like whole new Destruction.
My stats off the top of my hat are ilvl 856 with 29% haste, 26% crit, 47% mastery and 2% vers + Feretory of Souls... I can push about 270-290k single target over reasonable length of time, if it's some 50 seconds boss, it can be 350k+.
If it's some cleave heavy fight - I am a god really, did not see anyone touch me there unless it is also AoE heavy, in which case it depends on whether it is burst AoE or sustained, with sustained Cata's free immo spread + stacked RoFs are pretty good tier A sustained AoE. If it's burst - then I am usually outclasses by Monks/DHs and some others with strong AoE burst.