Mysterious Stranger |
If you want to build a character completely from the ground a d20 based system is not the way to go. In all honesty your best bet would be something like the Hero System. It is a 100% point-based system that will allow you to create just about any type of character you want. Fantasy Hero is probably what you should be looking at.
https://www.herogames.com/
OmniMage |
Hmm... Divine Grace (2nd level Paladin ability) is not on the list of things to buy. I think it would be worth 15 points; just like saving throws.
If you are looking for a point buy class system, you could try Anime 5E. Its made by the same folks who made BESM 4th edition (Big Eyes Small Mouths). However, its a mix of BESM and DND 5E, so it might require some effort to adapt it to pathfinder.
There was also BESM d20 made back in 3rd edition, so it might be a better fit.
https://www.drivethrurpg.com/product/850/BESM-d20-Revised-Edition