At its current state, the WHM Holy spells is lacking enough usefulness to be worthy of a Job ability.
Due to its recast(5 mins), its Magic potency(near the same dmg of Stonera), and most of all, it's MP cost(All MP).

I do not see that all 3 categories need to be improved, but at least one of the 3 would make the spell somewhat useful, instead of being a fun flashy gimmick finisher move that is only used when you're just messing around or have already won the battle.

Please strongly consider improving the Magic Potency of this spell, to reflect the cost(MP and recast).
Or just remove the cost of all MP.
Or simply give it much shorter recast time.

Thank you for your consideration.