My endgame raven/hurricane druid:
Not the best build around, but wanted to push it in a sensible way to best outcome. Enigma is sort of nice for running t4 maps and tried different setup that were less than ideal. The goal is to sustain 163% FCR, which I do with 2x 20% FCR rings and FCR ammy. I have a 20% FCR +2 summon skills ammy that I could use with vipermagi and doom for optimal pierce cold of hurricane. But the cold mastery switch does some piercing of its own.
I should have thawing potions in belt, but meh. That multishot dude in the middle hit like a brick and made me drink a rarely used rejuv.