Ok, I have now beaten him 3 times (I lose 1-2 shammies in the process). It's ugly, but it works. I just made a set of macros for my numpad to heal each character separately. The macro makes it so 2 shammies heal the one taking damage, while the other 3 shoot Lightning Bolts on the mains target. Works pretty well.

Omar the Unscarred was laughable. I burned him down before he even released his felhound, didn't take any damage because of grounding totems, and still had 85% mana.

The Dragon, whooped my ass... just like every other person in here that boxed him for the first time. I think it's going to be really hard without an actual tank. I try to use frostshock to create more threat on one shaman, but I just can't seem to actually keep him up for more than 3 seconds.