I am attuned to The Great Mother, a diety of Magic and hearth and home. When I cast healing spells, I recieve piety from magic, but casting any form of healing spell (Primarily life transferrence, but have tested with potions of cure moderate), I receive the piety for casting a spell, but not the piety from healing.
If it is intended that an action should only provide piety once, I believe it should be the greater of the applicable sources, in the case of Life transferrence, the .5 from healing rather than the .1 of casting a spell.
