Posting this on behalf of a fellow raider who feels his position in the group might be in jeopardy due to his low dmg. I cannot provide WoL parses unfortunately. But I have watched him beating a dummy for a little while and seems he has the rotation under control and understands the statprios and gems/reforges accordingly. His DoTs are refreshed in a timely manner, casts DP right on cue and MB on cooldown while following the cast priority. Furthermore he says that he can see an increase of 80k dps when his Fiend is at work and a drop of 80k when it's gone again.
This is single target patchwerk style btw. He is pulling roughly 140k dps on every single target fight when expectations are 200k-250k. He has the 30% Haste cap (includes the 5% Goblin racial). No legendary cloak though.
Item Level: 547
Expectations: 200k-250k dps on patchwerk style fights with minimal to no movement.
Armory Link: http://eu.battle.net/wow/en/characte...%A4st/advanced
Worldoflogs Link: cannot provide, but will record the very next raid that he attends.