Devotion
Syntax: Devotion
A basic skill for most communers, devotion allows a priest to enter into intense prayers intended to rejuvinate the spirit and mind. While the outside world is all but lost to a priest entranced by such prayers, their mind and soul are submerged within their faith resulting in exponential recovery of the mind.
I could go for it. IF;
A) Regeneration of health is slowed by the same percentage as the boost granted to mana. Should not gimp the priest he can "cure".
Entering into the Devotion lags the priest. You WILL not enter into devotion to your god at the end of every hour just for the bonus.
C) What ullquiora says below, is adjusted.
Overall, nice Idea.