Not quite the same, but a guildie and me did the raid weekly, which was Noth, with 10 shamans. I believe he had one resto shaman, but my 5 were elemental. the damage he did was a complete joke, and even when the curses popped, mass chain heal solved that. I bet that 10 shaman could go pretty far in Naxx, but im sure there will be road blocks. Maybe get one enhance shaman with pvp gear, and tanking off set stuff, spamming frost shock...