Let's say that I want to run a game in Fate Core where there are weak little critters, folk, heroes, legendary heroes, and gods, where the intent is that the players can go from folk all the way up to gods.
What modifications would I need to make to Fate Core to make this happen?
My main concerns are Skills and total point values: Aspects can change easily over time, but Skill Pyramids or Columns could get ridiculous at those upper ends.
A key factor in the whole thing is that I'd like for each of the levels to function the same way, such that I don't have to build completely separate writeups for a character at different power levels; I'd like characters to be able to "rank up" or down between the levels of power. In other words, I'd prefer a system that scales smoothly, instead of rebuilding at each power level.
In the fiction I'm working with, there are opportunities for the characters to pick fights with creatures outside their power level quite easily, so modeling higher-powered beings simply as Main NPCs (when they're not core to the story) seems a little off-putting.
I've read the Fate Scaling rules, which seem like they could be a decent start, but I'm curious about how standard character advancement would function with using scaling as "levels." Would "ranking up" in total power level be determined by the GM, or the total point values of the characters, as in D&D? Would I have to degrade player's capabilities when that happens to smooth out the progression?
Along the same lines, I've read Ryan Maklin's approach here, which seems alright, but would force GMs to make rulings on a case-by-case basis for beings of much higher "level," i.e. whether a Folk character competing against a Legend is Overwhelming Scale or not seems ambiguous, at the moment at least. Perhaps I should simply define that 1 step is Scale and 2 is Overwhelming? (These scale rules are steep, too, and I'd have the same question when it comes to advancement.)