Fixing Dark Knight, Properly

[Reynhart]

Darkside isn't a consideration, because its always on, so its potencies are balanced around it.

No, they're not. If you take a PLD and a DRK in tank stance, the 20% permanent damage buff is very significant.

PLD has a ludicrously potent DoT that provides a similar, constant pseudo buff. (The DoT ticks of GB are in the neighborhood of 20% of DRK's PPGCD, ergo, GB is essentially PLD's SE/DS).

And you don't count Bloodspiller in our rotation ? DA-BS has a higher potency than GB if you're under Grit, and you can easily use it as often as GB if you manage Blood Weapon properly. Blood Weapon that also increases our attack speed, thus increasing our potency/s. And what about Plunge or Carve & Spit ?
On top of that, DRK has the most forgiving rotation, precisely because it relies less on timed buffs, and can spend Dark Arts basically whenever it feels, as long as it doesn't overflow on MP.

I agree that DRK is a bit off, but it's definitely on the raid utility department, not on damage.