CoS is an awesome skill, but honestly, I tend to usually follow it with a Flash right after it. And precede it with FoF when it's up.

When you take into account Shield Oath multiplier and the fact the DoT is counted in your enmity generated, no, it's far from laughable.

I do miss Holy Succor though. For some reason, to me, a PLD in Final Fantasy needs to have some curing ability. Cure I simply doesn't cut it.