I'm having a lot of problems trying to do enough dps on the platforms to kill the add. I'm normally the worst dps (about 5-7M), the others are either melees or warlock/hunter so they don't have the issue of movability. I'm tried arcane which (I guess) will be the best spec for phase 2, but after that I've changed to fire to be able to do "something" on the platforms while moving (with sha assistant).
The problem is that if I wanna stay alive, I can't complete a full evocation. I'm trying to evocate on main platform just before travel to the add platform so at least I'm 30sec with the evocation buff, but still I'm not doing enough damage and the only times we kill the add on time is when our disc priest is in my group (so he does the damage I'm not doing in comparative with the other dps).
Can someone give me some tips or advices? Honestly, my only thought right now is to left my spot to another raider.