Actually, it was Paladin.
Drk was absolutely disgusting in HW. Blood Price (Any attack taken) adds mp for more Dark Arts spam, Delirium 3rd Combo GCD (INT down) making Monk irrelevant since you had it permanently up, any parry results to free leg kicks (DPS + Stun) meaning it reset the cooldown instantly and Dark Dance helping out (20% Parry increase), Scourge (GCD Dot), Reprisal (short cooldown triggered by parry), Abyssal Drain (GCD), Salted Earth (45 seconds CD), Plunge.
All Paladin got was Clemency , Divine Veil, Goring Blade and Royal Authority. It got no tools compared to what Dark Knight had, including Warrior.
Warrior got Deliverance (Damage Increase 5% and Crit rate) making them another dps, Equilibrium, and a strange Raw Intuition which mobs crit you if you got hit from rear/flanks.