I went ahead and used my Pally as my main in Wailing Caverns and it was very nice! I can see where this would come in handy. And as others say, nice to have 5 shamans as well. So maybe I will not delete my main shaman and level it every so often. For now going with the pally as the main.

On another note. I noticed it was weird with the totems and the pally. Only every so often would one of the totems actually buff it. I would cast strength of earth and nothing! all the shamans would get it but not the pally. then later it would show up. Not sure what to think about that.