Stop being a bunch of pansies.
If you don't know how to pull without aggroing half of a Beastman company, don't pull.
If you do aggro a large number of mobs, don't be a pansy and run them into other people MPKing them.
If the walls show up before the mobs, DISENGAGE THE DAMN WALL when the mobs do show up. You get more credit for them anyway. (unsubstantiated, but it seems that way)
I fully expect to end up tanking campaign mobs on monk when I get higher. But I'm 64, so I can't. But at least I attempt to contribute. Jesus.