Some of my thoughts copied over from the reddit thread:

I use the following for MTing:
Dark Arts Pre-pull (wait 6) > Unmend > Plunge + Carve and Spit (450) > Hard Slash > Salted Earth + Blood Price > Spinning Slash > Dark Arts + Low Blow > Power Slash > Dark Passanger (optional) > Scourge
If unleash procs from unmend I use it instead of Hard Slash and just move it up 1 GCD, but the oGCDs stay the same.

For AOE pulls I kind of just wing it. If I had to come up with a decent opener though I'd probably go with something like...

Assuming 5 mobs at least:
Unmend > Plunge + Dark Passanger > Unleash > Salted Earth + Blood Price > Unleash > Defensive CD + Dart Arts > Abyssal Drain > Unleash > oGCD + Dark Arts > Abyssal Drain > Kind of repeat till you think your mana can no longer support it.