This build has worked for me in Act 1, 2, and Act 3. It's a blend of the traditional kiting and the tanking CM build I used in 1.04. I can spam Frost Nova / Diamond skin when there is a large group, otherwise I do my best to Nova and kite at the same time. Healing blades help.

Gear requirements:
Critical Damage
Critical Chance
Armor
INT+++
Vit

http://us.battle.net/d3/en/calculator/wizard#WPYXOi!ghZ!YaYacc