Raiding 25 multibox is going to be rough. Take the first boss in SSC: Hydross

This boss right here alone will stop this group cold. I don't care how much dps you put out you need to lock down the mobs somehow and be able to kite him back and forth. You'll need 2 tanks 1 frost 1 nature and the sheer amount of coordination would be intense. If you can do it, you should fly jet planes for the Air Force. You must heal, kite 4 mobs around, dps them, and shift a boss around. If you had 4 arms you could do it.

Pre-BC raids no problem, none at all. Most of them required you to stand there, heal and dps. No movement. nothing. karazan wont' be that bad except prince and chess.

The lack of the ability to move when random events occur (any ground flame is bad!) is going to be the stop gap for raiding BC content. EQ has mobs that stand there and let you be stupid and mash buttons. WoW requires mobility and split 2nd timing.

Have fun in 5/10 mans. I'll eat a bowl full of dog biscuts if this pack downs Kael or Vasjh!

Level a 4 shamans and a paladin to 70. try it. If you like it, finish the rest. You can train all day long after you get to 70, you are wasting your time attempting to tag mobs and dps them down as only the group that tagged the mob gets the xp credit, the rest are wasting time.