Valid point.
While the focus on region rituals would be an excellent next tier (what sort of affects did you have in mind? This one is partial to calling the Sandstorm or some other very unpleasant weather that is less directly aggressive than Lightning Bolts), how do you feel about hypnosis type abilities, of course only useful against the weak willed (read: NPCs valid targets or concussion damage), but putting enemies in a haze and then walking them to the sacrifice place seems to be both in theme and have function.