When should WHM use Stoneskin I?

[Ghishlain]

Just a small correction here because of the fact MP effeciency is important to a WHM therefore it's important to use correct values.

During combat, it's not terribly useful except on yourself to cast before party-wide/raid-wide damage. Mainly you're expending the same amount of MP that Cure III II uses to get 10-18% of the total HP as a shield versus 550 650 potency of Cure III II. If you keep casting it on a tank you will rapidly deplete your MP and you may as well just cast cure II repeatedly.

Kisai probably just accidentally compared the MP values of Stoneskin II versus Cure III instead of Stoneskin to Cure II.