In defense of the raw DPS without a healer in instances...

I happen to know a certain somebody that currently runs 4 mages and a warrior and they have cleared up to Uldaman.

Also the five Shaman route is very viable. So far I'm up to lvl 39 and I have been able to clear instances my level for quite some time. I can see heroics being a bit of a challange, but what fun would the game be if we didn't have the challanges?