Wizard Arcane Orb. Just don't use DMO. Triumvirate/unstable scepter/Orb of Infinite Depth. Stat your rings for CHC and CHD. Crown of the Primus in helm (all runes on time warp active.)
I did this on the first try with something like 7 minutes remaining.
If you're already a wizard playing DMO orbit, keep the same spells, except change teleport to wormhole so you can skip to elites. You won't be 1shotting GR 70 elites for 10 billion HP crits, but you'll do just fine.
After trying several Wizard Fire Builds involving hydras, twisters, disintegrate/deathwish/etched sigil etc., I just decided to go back to orb. It worked perfectly. Super easy.
Half my gear didn't even synergize with the ORbit build and was leftover from trying disintegrate/meteor. Still, easy as pie.
Here's a screenshot of my D3 armory (since I will be changing gear soon now that I've done the conquest..!):
In the cube:
Triumvirate, Helm of the Primus, Unity (and a Unity + Immortal Token on follower.)