Yeah, diamond skin and wormhole are great defensive skills. Unfortunately they mean nothing as of Act IV hell when even the most basic of enemies can shatter through diamond skin like it was paper and can teleport just as well as you can. I'll probably have to trade in some DPS for survivability if I want to solo Act IV hell, but it's probably easier to find a friend who's a good tank.

Also sycld, if the auction house is ever up again you should go buy some new gear because you should be tearing through enemies on nightmare like a kleenex at a snot party.