Just as another update, I will also try to get started on character creation today. Each of the players-- Mythic-1, Mythic-2, and me-- will have both a Protagonist and an Antagonist.
After that, I will use this all this info to create the Praxis Scales, which are basically two sets of opposing stats that encompass how everything in this world is done. Right now, based on all the details, I think that one of the scales will be "Harmony vs. Individuality", though I'm also considering "Conservation vs. Change."