SS/Fire ...bang n burn
DM/ Unvuln (beastly tough)....never got hit, when he did...it was a scratch.....that would get healed by drain. PvP with an energy/stone brute was a stalemate.
Stone/Electric - beast..fault kept most mobs perma disoriented and on their backs. Tested extensively. These two compliment each other well. Skip tremor, it would actually slow you down due to animation time.....just the fast recharge with fault and hammers was amazing.