Picking an idea I came up in another topic.
Officialy, PLD's design is to be the tanks that mitigates. It has an obvious issue here, since, every tank is sturdy enough to survive each encounter. And it's a good thing, since you don't want PLD to become mandatory. But, if PLD was able to solo tank anything,it wouldn't be mandatory, but just an option. You'd chose either one PLD or two of any tanks.
The tricky part here is that some fight are designed to prevent solo tanking, like A1 where the two bosses buff each other, or A3 with the resistance down. It's as old as Titan EX and T6, though.
But, what if PLD had an ability especially for those kind of situation ?
I present you : "Divine Calling"
Recast : GCD
Cost : Nearly half of MP pool.
Effect : Gain a Divine Stack
- Under Shield Oath, each Divine Stack reduces damage received by 10% and damage dealt by 10%. Also increase enmity gain.
- Under Sword Oath, each Divine Stack increases the potency of auto-attacks by 5
Duration (To be determined)
Using Divine Calling again will put another Divine stack for a lesser duration
The idea here is something akin to Blood of the Dragon of Enochian. By timing you skills properly, you'd gain a stacking defense buff to compensate for all the stacking damage buff on enemies. But, since the duration is lowered more and more, you'd have no choice but to lose it at one point since it would take too much time to refill your MP.
This would give depth to PLD, a skill that varies depending on your stance. And a clear but not mandatory gap on damage reduction compared to other tanks.