Also I've been in groups with blu's that TP in full Jhakri or use outdated spells because they've been lazy. Everyone else, sometimes even the tank, are doing much more damage than them.

If sufficient means they can hit the boss and their ws's do damage. Bad spellsets or Jhakri (or any ambuscade set) is enough.

With the exception of monk (I honestly don't know how bad monk is, because I never see them), if you're in just an ambuscade set, you will be outdps'ing such a BLU. I'm sure Monk would be too but I never ever see monk.