I think Clemency is just a sort of "top up" healing.

There's this time when I tank The Vault with Ser Charibert. The AST was running OOM with Lustrous on CD and the MCH was dead so no MP regen there. So, I healed the BLM while getting some heals myself. The AST was fully healing me so I don't need that much heals anyway but the BLM wasn't receiving anything and "THE SICKNESS MUST BE PURGED" is slowly killing her. The healer got an AOE dot on everyone but it couldn't hold up against "THE SICKNESS MUST BE PURGED."

I spammed Riot Blade and got her up to half health at most at times, so she can actually DPS the boss.

We killed him with me half health and the BLM and AST on the verge of death. The MCH never got up again.

Clemency is like HG. It needs to be planned to be used effectively and I have never been interrupted before casting it. I mean if I have went WAR and about the same HP percent at that point and I only have Equilibrium? We would've wiped.

Clemency is a good tool for me and like everything about PLD, it's more focused on preserving life than destroying enemies like WAR or DRK. I like it.

But THAT doesn't mean I wouldn't enjoy it being instant cast or less cast time.