I would wager that the Fixer long-duration HoT's are probably the single most unbalancing line in lower level PvP. I've personally seen 4 level 60'ish trying to kill one other 60 buffed with Hack n Quack and fail miserably. I'd personally like to see level requirements for the long term HoT's, and I bet that would ease a lot of frustration that is going on a some tower battles.