Do you have access to the old Channeling Companion?
Starting on page 120 is list of "spheres of influence" for the priest profession. You could take the sphe of Ancestors, Arts, Crafts, Culture, Magic or Wisdom as base, depending what is more fitting. And then replace up to 3 of the base lists with each one base list from 3 spheres.
For example: Wisdom as base, but replace "Holy Wrath" with "Ceromonies" from Culture.