Ever since I worked on the HARP rewrite a decade or so ago, I have thought mana sources and the skill of using them needed a good going over.

I think that however many sources of mana there are, each of them should have a separate and distinct skill of tapping that power (thus acquiring "power points"  or whatever label you choose), and that none of those skills should be a "magical skill." For example, power from the Gods should be sourced by the skill of Appeasement, an Influence/Social skill. Power drawn from the natural flow of the planet or plane you're on should be sourced by Thaumatology, an Academic/Scientific skill.

Anyone have any thoughts or comments on the subject?