How are you with melee teams? It's all about the melee this expansion.

Ranged DPS, and most especially elemental shaman, are in a very bad spot right now. I think its the movement required during fights keep ranged DPS very low. Heard the BM and MM hunters are ok, and I had luck with Dest warlock.

I would check out the video section and see some of the teams running dungeons now. 5x pali tank and 4xDK+1 pali seem good options.