What I really don't get is the overlord so-far away god motif like the Over God AO in Forgotten Realms. In most religions either there's no such thing, or he will let his will be known threw his threw others (Prophets, Angels, other Gods, etc.). Even if you're the Granddaddy of the Gods, if you don't let yourself be known, you don't exist. So having a God so powerful he doesn't have to let himself be known to any potential followers does not make sense. All religions require some sort of dialogue between the worshiper and the deity, whether it would be through prayer or actual interactions.