My main is a Warlock. I've specced affliction, demo, and destruction in the past.

I'm demo all the way as a boxer. Its hard to beat the low-micro requirements of the felguard. While I haven't played much in 3.0 it looks like the Felguard's been buffed.

So, trash mobs: send in pet, spam shadow bolt, my pally holding aggro. For boss mobs, add corruption/CoA/CoE. Seems pretty low maintenance.

A lot of the new talents (all classes) "feel" micro intensive. To me, that's anti-boxer. ymmv