I honestly cannot see any other class being succesful in highend pvp. Shamans are (1) sort of broke when you stack 4 and 5 in one group and (2) you simply cannot cc them if you alternate tremor totems. Any other class is going to get wtf owned 5 boxxing ( or 4 ) because of the CC issues. Your group will get spread out seperated and owned. I'm sure with practice you'll sit around 1500-1600 with other class makeups, but I really would like to put a challenge up for anyone else to break 1800 using anything other than the *sigh* shaman pewpew train. Hunters possibly due to BW but I forsee a lot of issues there also. Take away tremor and shamans would be just as useless as the rest imo. Maybe theres already multiple 1800+ teams out there that arent mostly shamans, but I doubt it ( speaking strictly in terms of 5 boxxers .. or 4 ). In PVE theres a million different ways to be succesful, gotta have at least some heals though and some resemblence of a tank for certain situations that will arrise in nearly every instance.

-Mike