Multiboxing Warlocks - spec?

[Ninsew]

'sup guys!

I'm gonna multibox two warlocks to 80 with Refer a Friend, mostly through Dungerons I think.
My question is what spec I should go with? Since we're going to cast the same spells all the time, so I don't want any spec that depends alot on procs (let's say, Survival as Hunter with Lock n' Load). I hope you get it.. So, what spec should I use?

Thanks alot.

If you feel like it, feel free to comment aswell and tell me why you think what you think.

[Lichantor]

Destruction or Affliction depending on whether you want nukes or DOTs.

[roflwaffle]

id think destruction would be best cause its got like one instant cast?

[toshax]

demonology... felstorm + HoG is great for leveling.

[Ninsew]

Dumpin'hihi

[Zinnin]

Demo with the Impending Doom talent is too RNG that I would want multibox it since the rotations might differ slightly. And ISF for destro would be hard to multibox with different IMP procs.

Affliction would be the stable to multibox because procs won't mess up the rotation too much and would be the easiest to play.

[Deleted]

I don't think Affliction would work either, considering nightfall procs and such.
In a way, all of the specs have some kind of mechanic that make it hard/annoying to multibox.