DRK is a DPS machine.

The attacks added to PLD were just so they could keep up with DRK/WAR. Goring Blade's 540 potency gated by a 3 chain combo, and DRK's Scourge, 500 potency stand alone ability. Royal Authority brings the RoH combo up to 237.5 average potency. Dark Arts/Souleatter is 266 and if you want to maintain MP and cut CDs out of the rotation Delirium into DA/Souleatter spam averages to 246.

I'm curious about all out WAR Vs. DRK, but I don't think PLD will be in the equation, PLD has some sexy defensive utility now though in Clemency and Divine Veil.