Strength Tanks

[Syzygian]

Souleater comes close, but to get 5k HP worth of heals out of it requires at least two DASEs, which costs way more MP than Clemency does, and 6 GCDs.

You regenerate half of the cost simply by rotating through the combo b/c of Syphon Strike. A single DA Souleater has a net loss of less than 1000 MP.

2 DA Souleaters = 884 - 1768 + 884 - 1768 = 1768 MP cost. Clemency is 2121 iirc.

PLD loses the ability to block/parry/do damage for 3 seconds and heals for 1200 potency for 2121 MP.
DRK continues to parry and deals 1600 potency over 6 GCDs not counting oGCD, heals for 800 potency for 1768 MP, and cannot be interrupted.

I'd call that a wash.