Some chars to complement my 3 locks.

[Ayraclus]

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.

[mikekim]

Probably Prot Pally for the Tank and a resto shammy for totems/healing

[Drizzit]

Go pally for tank... It has been talked to death in these forums that pally are the best MB tanks.

For healing i would say go with a priest. Reason is that with more then 1 lock (some could agrue that even with 1) priest are the best because of there AoE heal. Think about it, you have 3 locks and they use all there mana instead of drinking you can life tap and then heal them and move on with almost no down time. Granted a sham has chain heal but each heal is less then the first, with the priest it is the same plus you can heal the tank. I went with a priest for my 3 locks and pally team.