I have no idea either. Im at the point where im starting to try Heroics and I have more than enough healing to live, but it just takes forever to kill things with 60-80k hp trash. The first boss in Drak'Tharon Keep is a simple tank and spank DPS race. He slowly hits harder and harder to the point where he eventually just 2 shots you. Hes got like 450k hp and I can get him down to about 75k hp when my druids get one shotted from his aoe shadow suck and my paladin dies right after on the next melee hit. Thats around 20 stacks of his +damage buff. I know I can take him, I just need more DPS. About 20% more. So going from 900dps to say 1200dps should not be too hard I would think and 1000 spell power at level 80 to me seems 1200 dps should be easily attainable.