Good 5 man comps purely for pve / dungeon leveling

[CokeZero]

Thanks for the suggestions. I've narrowed my choices to these two:
warrior / priest / 3 mages
paladin / priest 3 mages
(warlock would probably be great as well but I want 3 different classes at most to keep it simple)

How do they compare?

I run a bear tank, priest, warlock, and 2 mages. Mainly because I wanted to provide my team with every available buff

Mages, as far as DPS goes in a multiboxing setup, are far superior in almost every way. The AoE control is just so damn good and they don't go OOM in seconds like a warlock does. Warlocks you need to weave in a lifetap here and there to keep them casting.

That said, I do not regret putting a warlock in the team, and if I had to level a new team all over again a warlock would be a must for me. I love the utility they bring with healthstones, soulstones, more HP if you're running a tank with imp stamina, and if you're running a warrior tank the imp fire shield can help the tank hold aoe threat. The fire shield is useful on the bear as well when you are fighting nature immune mobs, since thorns is nature damage. I guess it's useful for a pally too, not sure if it stacks with whatever they may have, dunno, never played one.

And then of course the main reason I love my warlock, summoning! I love being able to ship a toon back to town to empty bags and sell, then summon him right back and keep on grinding/farming.