Frozen Orb and Archon Wizard (With high APOC and high crit, as well as a high AP pool)
Link to build:
Wizard - Game Guide - Diablo III
Outgearing/Playing on low torment allows you to shoot 1-2 Frozen Orbs and follow that orb to its destination. Any white mobs will be slain by these orbs, so you only stop for the time it takes to cast the orb. Frozen Orb is best used at a medium-far distance, because it explodes at the end. On Elites you either empty your AP pool on Frozen Orbs and they die from that, or you pop your Archon if it is available and zap them down with that. With Electrocute (Forked Lightning) as generator you still have a good aoe damage output at any range and a good single target ability as your AP generator.
Frozen Orb has issues with walling (It doesn't go through it, obviously).
Frozen Orb has medium range, but explodes at max range. It is best used by the orb exploding immediatly behind its target. Assuming the target is walking towards you, you simply try to fire your orb so orb-maxrange is where the target currently stands.
Archon has a long cooldown.
Familiar Icicle stuns a single target regularly and is a great tool for soloplay.
When there's no archon available and the elites didn't die from you emptying your AP pool with frozen orbs, kiting with electrocute/Frozen Orbs is necesary, because of the explossion range of the Orb (Assuming the elites are melee).
This build works with ease for speed-clearing and zero or few deaths in my equipment, with 500k damage and 1000k toughness (60% crit, 20 APoC), on torment 2. Viable, but risking more deaths, up to torment 5.