Well, i started to 3box 3 locks, and i'm doing it pretty well, but i'll need some healing and maybe a tank before going to to dungeons...
i was thinking about a priest and a pally, or maybe 2 pallys, or maybe a priest and another lock, or maybe just another priest...
i think boxing 3 clases will be pretty hard, but maintaining aggro with the pally doesn't seem so hard, i'll need a tank to do outland's 5 mans and heroics, but, IDK.