Years ago, I had worked out some guidelines for power levels for RQ. Others may find these useful.
POW 0: Inanimate objects, Plants, Animals with only instinctive intelligence
POW 5: Animals with adaptive intelligence
POW 10: Normal humans and comparable creatures
POW 15: Fantasy races, elite humans, Power users
POW 20: Supernatural races, elite members of fantasy races, heroes, minor gods
POW 25: Mid-ranked gods
POW 30: Major gods
POW 35: Ruling god
By fantasy races, I mean creatures which are more magical or powerful than humans but are still mortal and have normal socities. In Tolkien, Dwarves, Hobbits and the Dunedain would count. In Greek mythology, the Centaurs would be a fantasy race
By supernatural races, I mean creatures which are unaging and the like. In Tolkien, Elves (and the Nazgul) would be a supernatural racea. In Greek mythology, nymphs, satyrs and river gods would be included.
Mid-ranked gods in Tolkien would include the Wizards, Tom Bombadil and the Witch-King. In Greek mythology beings like Pan, Proteus and the Giants would be at this level.
Major Gods in Tolkien would be the Valar (and Sauron). In Greek mythology the 12 Olympians would the major gods.
The Ruling god level would Manwe (& Morgoth) in Tolkien, while in Greek myth only Zeus would be at this level.