Just got into Act 3 of Inferno. I had a hard time killing Belial because I was with an undergeared monk. We did manage to kill him though, because the monk was good at dodging all the attacks and managed to revive me twice in the 3rd stage (I always die there due to lag). DHs simply aren't made for parties, at least not it inferno.

I am now at 55k DPS without SS, but only 4k life LOL.