I've thought about this combo several times as my original character was a hunter (and pretty well known in pre-BC WOW for my hunter how to videos (back then, hunters were often considered a weak class in PvP -- google "Clovian hunter pvp video").

Anyhow, while this would be fun for instances my ultimately goal with multiboxing has always been PvP and sadly this is not a viable comp for arenas.

For fun I made 5 hunters on the PTR and took them into a few WSGs and its probably more of because I really had no idea what I was doing (I haven't played my hunter seriously since 60 and its such a different class now) but I just got rapped over and over.

On my shamans on the other hand, people are actually happy to see me when I join a BG But that's a class I've had a lot of practice with in boxing.