Al'Akir 10heroic I held world first DPS across all classes for a few weeks, so clearly we scale slightly better perhaps from percentage debuffs on targets, at least from my experience anyway.
Also, the comment of Atramedes air phase affect all melee equally is wrong. We can still stand and hard cast spells to maintain DPS, a rogue, warrior, etc. can't do anything in this phase at all. We are at a significant advantage there.