For RMU, aside from homebrew, you're just looking at Spell Law and Treasure Law. There are no arcane lists yet. You can certainly take a look at the lists from previous editions, e.g. RMFRP Arcane Companion has the arcane lists.
For divine level power, it depends on your conception of how deities work, but personally I would interpret the spell lists loosely and give them a power boost. On the other hand, I would have them actually appear very rarely (and mostly work through followers and minions), so I might not need spell lists at all.