Mutilate spec - additional,

After creating the last post, I went ahead with the poison tests - and found that with Instant Poison on my offhand instead of Deadly, that the recount presented a consistent 1300+ DPS.

Another optimisation session with another guild rogue, we managed to push them from 1600 to 2100 DPS simply by enforcing 2 rules:

1) Dual instant poisons (they are combat spec and were using dual deadly poisons.)
2) 5 point eviscerates (there is no reason to + energy efficient.)

-V