[Drakeero]

Those are good functional requirements. To put things in perspective I was thinking of considerably higher wisdom requirement for high priest, like 40.

There are certain functional benefits that come from a higher wisdom level. Higher damage, more powerful avatars, more successful healing, more healing period, and greater amounts of created food.

Ideally once the system gets established, it shouldn't be too much harder for more advanced players to help the acolytes develop their powers. As you point out though, 20 wisdom may be excessive. It may be dropped to 15.