@Hinin not sure if you are still tracking feedback on your custom civs. I'm currently working through your adaptions, finished the Scots and now trying out the Benin. I like that you give each such distinctive playstyles that encourage/reward combinations of different policy trees. Very much enjoying Benin, seems like they lean into the most enjoyable way to warfare as a human player by racking up highly promoted units. The Iya really shines in early game if you take tradition as ancient policy tree.
I have to question is the Igunematon's tech and science scaling working as intended, as I feel it provides a possibly overpowered power spike to waging war?
I'm in Industrial era and with 5 guilds in my 5 non puppet cities I get 400 science and production in the capital per unit that dies, which makes getting through techs and wonders a breeze with the other cities pumping out more units to send to the front line. It's a lot of fun and makes tradition warfare profitable