Divine rituals to be empowered or counter arcane rituals require 400cp minimum, plus a lesser or greater offering. Needing
Lesser : Diamond, Sapphire, Emerald
Greater : Emerald, Sunstone, Moonstone
These are expensive, especially en-mass. Versus Arcane rituals which need much cheaper, easier to gather components. Like giant heads or Dragon Blood ( I do not wish to spoil rituals discovery or what they do here)
I suggest Arcane Rituals get "Arcane Offerings" or "Arcane ritual components" requiring 400CP plus similar gemstones. Or make divine ritual components similar rather than being extortionate.