Protect/Shell Duration Increase

[Ryndael]

I agree that Protect and shell should have a longer timer but I also think that spells like Stoneskin, shock spikes, protect, shell, etc should have their effectiveness and lenght improved with the caster's PIE (piety). So the higher the PIE of the caster, the longer the buff last and is more effective (stoneskin absorbs more dmg, protect gives more defense, etc).

Stoneskin's buff is already based off of Mind, it blocks the same amount of damage as you heal with Cure II (Stoneskin II). Why would they change it to Piety? Piety only has to do with accuracy and dot damage.