What I think is best might not be what other think is best. I personally don't like to die, so I make sure my DR%/All res is good before worrying about damage.

Corrupted shako (2x cold hora/perf facets
Druid neph (cold hora)
Sanctuary's balance 4/30/30 (6 perf facets)
Frostmourne
Corrupted SS (3 rare all res jewels)
1 druid soj 10% cold
1 cons ring
LK boots (10% DR, -15 cold)
Tyrael's belt (10% cold)
Purifying gaunlets

2x nado prime, +3 tornado anni, 10% eyeball, alkor charm, belial's, d torch, however many skillers can fit, rest can be either dice or w/e small charms u want. This should put you at around 25k nados (which is more than enough damage), 75% DR, 7k+ hp buffed, 85-90 all res.

If you want to get into more expensive than what I outlined, throw +druid chants on everything but armor and belt. Put a teleport chant on armor, 5% cold damage on belt. This will get you 30k+ nados.