I've been running Magic Missiles: Conflag w/ Mirror Ball ever since I hit 70 on my Wizard; I Currently do T6 quite often, and things die quickly. Something I have noted that I have not seen anyone mention is that the DoT from Magic Missiles: Conflag Stacks forever and have seen ticks for over 100M.
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For those interested here's my build: http://us.battle.net/d3/en/profile/deifixk-1491/hero/3509928