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 **** 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.