Dark Knight, or Paladin?

[Giantbane]

also power slash gets darkside damage bonus always and is 150/220/300 potency as opposed to paladin's 150/200/260 combo which only gets FoF bonus 33% of the time (and you have to sacrifice fitting in a second goring blade if you chose to open with it).

also circle of scron's aggro modifier combined with rage of halone (4400 + 900 = 5300) still can't match power slash dark arts + salted earth (6315 + 1207 = 7522 potency).

it's a pretty blatantly worse situation.

Sort of. You're only looking at that action alone and not the effects beyond that one combo. Sword Oath's extra potency keeps going while you're using RoH. DRK's mana regen goes negative while they're doing a PS combo, and it goes very heavily negative with DA + PS. For the DRK, this means losing out on damage from extra DA + SE later. For the PLD that does a RoH combo over a RA combo, they only lose the 80 potency up front. It doesn't cause any further loss of damage after the fact.