UW clear with Heroes

ok so my friend and I have been trying to clear nm UW for the past few days. We've been using heroes; basically rt spirits, rt dmg, necro/rt, 2 smiters and another rt. Though we haven't reached Dhumm yet, I was wondering if we made it there if it was possible to beat him with our heroes. And if so could you share some advice on how to beat Dhumm with heroes. TY

This might help? http://pvx.wikia.com/wiki/Build:Team_-_UW_Heroway

Good luck