Due to hardware limitations, and not having the dough to shell out for a new tower, I'm 3 boxing shaman, and I'm havin a ball. For pvp, you'll lack the OMG 1 hit punch till you get good spelldamage. But still, with 3, if you let me get a cast off comfortably, you're toast. Throw in a shock and not much can survive, especially if there's a few crits in there. I imagine at 70 I'll have to mix in more healing talents and gear, since I'll be a little more on the defensive than a 5 boxer. (the loss of one making a much larger difference when you only have 3) I regret not having my own "anytime anywhere" instance crew, since finding groups is the crappiest part of wow.