I have an obediance on my zmiters weapon. With my fanaticism and his might aura, he's packing a 7k punch with enchant on. When playing with a hammerdin, his conc aura increases it even higher.
On my barb and my windy, he uses reapers. The decrep is more useful as it doesn't overwrite my zmiters life tap (very annoying) and it increases my own damage.
My amaz uses harmony with tals helm and trechery.