Cure III a tad underwhelming?

[Syncness]

So basically Cure III is the player target AoE heal, it has 550 potency compared to 400 for Cure I and 650 for Cure II.

However, whilst the cast range is 30 yards, its effect radius is only 4 yards.

It's mana cost is around 6x the cost of Cure I IIRC.

So far Chimera is the only fight I know that players stack, and even then stacking is to avoid damage so Cure III wouldn't be necessary (not to mention the fight is easy without Cure III anyway). Hydra tanks could possibly stack, but still the mana cost is too much.

The skill effect is unique to Cure III, but is not viable for any current fights (inc coil up to turn 4).

Comments?