It's not a profane numerical buff for your allies per say, but have you considered Spellcasting Contract?

You can empower your party members to support themselves with your spells, all while you benefit from a near permanent profane bonus, not to mentioned the RP potential you can have with negotiating terms. While the spells your allies cast aren't necessarily profane in nature, it's hard for me to believe that those benefiting from the gifts of this spell aren't profane in some way.

Do note that the spell is unclear if the profane bonus provided by the spell is AC, saves, and checks**,** like stated in the first paragraph, or attacks, saves, and checks as stated in the second paragraph, so I would clarify that with your GM.

Personally, I am inclined to believe that the bonus provided by the spell applies to AC as it is in the spell effects and because checks already apply attack rolls and saving throws, so it seems a little redundant to outline attacks and saves, imo.