Quote from Irrational
What you're really gonna have to do is to put most of everything into energy and vitality. Put 5 into strength once in a while to wear a breast plate but that's about it.
Plus, I'm thinking of doing the defensive aura vindicator, or, as the person who wrote up the faq, an angel build. Basically, aside from using vengeance, he uses the resist and salvation auras, so, in theory, you don't have to worry about resists, just get decent DR type gear, which is pretty easy if you're not worried about resists.
Edit: Something I just thought of: Might someone want to be an enchant sorc? I'm pretty sure that high level enchants add massive damage to weapons. The particular guide I saw recommended using a bow as the sorc. I guess it wouldn't be quite the all powerful cl/orb sorc that everyone and their mother has, but it could greatly increase some of the damage of the party.