So, i rolled a 5 box undead mage team (i mostly went with 5 mages for the simplicity.) Now the mages are 64, and I realize all the content i'm missing out on, due to no heals and no tank, doh! (My primary choice for these were pvp, and i can't wait for WotLK and mirror image ... Starting a 5v5 arena with 20 mages casting frostfire bolts and 5 water elementals is going to be an experience to say the least.)

So, logically, the only thing left for me to do is evolve my 5 box system into a 10 box system

Question is, what class makeup do I add? I'm leaning towards a paladin and 4 shamans. With that in mind i could run 5 man instances with the paladin / shamans, PVP with the mages, and attempt 10 man instances with all of the above. I'm aware of the benefits for this makeup, but does anyone see any inherent flaws with it; anyone have any suggestions for a better addition?

Thanks for your opinions!