I give up. I tried to make a build, but there is just too much. There is the betrayal aspect, aswell as the story with the divines, the relationship between the characters and that already makes a lot. But on top of that there is the character build which could be a cyoa by itself and even then the power level are all over the place, you go from "magic missile pew pew" to "become a litteral god and unveil the truth of the universe" with the latter part not fitting into the betrayal story at all because it's just too absurd of a power level.
Basically I feel like it's a lot of good and interesting ideas (the setting is genuinely interesting and I can feel the effort put into making the magic system consistent) but all thrown into one place regardless of wether or not they belong together. I can't feasibly focus on crafting a genuinely interesting betrayal story and on unveiling the mysteries of magic. I just spent my afternoon on this and I'm not even close to having a first draft of a build that makes sense.
Honestly if it was a serie of multiple cyoa that built on top of each other that would probably work much better, and it could incorporate the scaling power levels in ways that makes the previous cyoa basically irrelevant.
A basic idea of what that would do is to have first a cyoa where you build your party of low level heroes and bring them to a satisfying conclusion.
Then a cyoa about the betrayal where the previous cyoa would only slightly affect the direction of your build. (Basically the ending and your overall chracter archetype would affect the distribution of points for this one but not to an unhealthy amount).
And THEN a cyoa about ascending into a god or unravelling the mystery of the universe or whatever. (again with some influence from the previous one but not too major).
Of course that would be a lot of work and I'd never expect the author actually doing that =p