Meant to add a few footnotes to the above posts.
The basic Pantheon construction seems to suggest you would have an Earthly Skyfather range from about Level 32 Solo (Ukko of the Finnish Pantheon) to about Level 37 Solo (Jupiter of the Roman Pantheon). With Odin (for reference) at Level 35 Solo.
I am unsure if this should be the overall format for any Immortal's Index series of books. On the one hand I like the idea that not all of the Pantheons would be equal - I think that certainly makes the stats a lot more interesting.
However, on the other hand it sort of makes the majority of deities a tad weaker than I would have liked. For instance both Thor and Set would be Level 32 Solo encounters. The latter is relevant because he's the BBEG in the first
4E adventure I am writing for Levels 31-33.
So again theres a case for just making all the Earthly Pantheons have a 10 billion worshipper base, with Skyfathers Solo encounters Level 37-41.
Of course theres no reason why I couldn't just say that (for the purposes of the adventure) Set gained a large influx of worshippers (masquerading as a 5-level power-up) because of his shenanigans. But I would rather have the whole thing balanced before putting together a load of stat blocks.
Then again I suppose what I could do is use the Level 50 base but then add a page which lists the revised Levels of the Pantheon based upon their Earthly numbers of worshippers at the height of their power. Perhaps thats the way to go.
So Set would be a Level 37 Solo encounter with 100+ million worshippers, but derived solely from Earth's history he would have been a Level 32 Solo encounter with less than a million worshippers.
Any thoughts?