Re: Best build for running meph and andy?
It's all about versatility...I've found that if you want to do Meph only, and never anything else...do Blizzard...but if you want to actually play other parts of the game you will probably want to dual-tree.
The Fallen? I always kill them before I creep up to where Andariel notices me, so they aren't even a part of the equation.