I read the first post of the thread and found the answer in about three minutes. Given that I don't even play the class, you pretty much have no excuse.
I would recommend that you sit back and lay off posting for a while until you're sure you know what's what around here. You have accumulated 7 points, and your next one gets you a one month ban. Two more after that and you're gone for good.
my rotation as affliction is: SB, haunt, UA, Immo, CoA, Corr, SL. In Naxx 10 on patchwerk(nothing new) pushed around 4890DPS using Doomguard, when patchwerk is under 25% health, I've used drain soul until all dots expires them i renewed them and continue to use drainsoul, are it correct?