WWS
This was our kill last week - all three shadowpriests were soaking. Sunarith wasn't using starshards as we had huge debuff limit issues. Kalley had a resto shaman and heroism, the others didn't. Sunarith and Kalley had three drummers, while Aristoteles had none.
1400-1500 is about what I'd expect from a soaking shadowpriest, and it's all very buff-dependant.