Birthright - pathfinder 1st edition(3.75) rework any suggestion is welcome

[cccpxepoj]

Hello everyone,
it's been a while since i posted here the last time.
Fortunately I never stoped playing DnD/PF in that time.
After a few years where we adventured on Golarion most of our group, who were old BR hard core fans, decided to return to our favorite setting.
Because I'm designated GM, most of the time, this forced me to start editting the whole setting to fit the new rules.
The first think i needed to tackle was the issue with bloodlines, which a I solved with implementation of mythic rules. Where each bloodline grants access to certain mythic paths.
The races and various racilal optons are handled by the rule of thumb for now, but i'm also preping documents for that.
As a general rulea all racial feats, traits etc, I'm trying to find the relevant culture in PF setting.
So Anuireans are Taldan/Cheliaxian, Rjurik are Ulfen/Khelid, Khinasi are Khadiran/Garundi, Brecht are Taldan/Varisian, Vos are Shoanti/Khelid etc.
Skinwalkers and geniekind races are represented also as low level bloodline mutations.
PF Gnomes and BR Halflings share a simmilar backstory so i kinda blended theese two.

Also the gods and their domains needed to be reworked so this is another mini project I have been working on and if there is any interest i will post it here.
Magic is next on the list afther that.
In regards to the realm play we still haven't reached that point yet in the game, but i would prefer to stick to the old regency and GB system. The PF settlements rules from UC showed to be too time consuming for pen and papper.

So do you have any suggestions how to procede further down this path, as the task is monumental any input is more than welcome.

PS:
I have read all the BR sourcebooks, and BRCS 3.0 conversion many times, and I'm trying to stick as close as possible to the source materials