Your enmity problem out of tank stance point is completely mood, pld is not even closely the worst for holding enmity in dps stance, the real loser is drk in that category.
Pld even in dps mode will go goring > RA > RA with every ra combo having savage blade in it an enmity skill, if the boss got phy attacks shield swipe procs another enmity skill.
A dark knight is not using a single enmity skill in their dps rota, more dps or not you can not generate more enmity than the savage blades every RA rota and shield swipe procs a pld has while focusing on dps