It's faster than Leapquake. It is a bit squishy though. Can get one shot if not careful.
Haven't tried the others. They may be better.
For farming t10s you can adjust any relatively quick build to add avarice band, boon of the hoarder and Goldwrap and toughness is no longer an issue. Every mob drops gold. You pick up any gold the second it drops, and pretty much one pile of gold is enough to give you invincibility. Then you can start selling out on damage gear and no longer worry about toughness. Add Warchezian and wreath of lightning for more speed.
The R4/IK6 is a ton faster than wastes, both sets can be augmented to be lightning fast, however with standoff cube'd, furious charge does increased damage as you get faster, so you will be one shotting pretty much everything in t10 when moving at + 200% MS. Wastes you will struggle to kill mobs quick enough unless you have pretty much perfect gear.
I also rolled a wizard and I'm using the Woh+ tal rasha death breath farm build. About same speed as R4/IK6 but lots more deaths breaths, and I barely spent any time optimizing the gear.