Have you tried the new talents for affliction?
If you are able to full dot someone and cast drain soul you can get 500k of sustained dps, which is insane!!
After testing it in random BGs for 2 hours and deleting heals I did 3 RBG and I was literaly useful. The thing is that you need to cast/channel 90% of time time, which is imposible...
On the other hand, this new talents seems to be an improvement in 2vs2.
What do you think about them?
(Sorry for my english ...)