Hey Bruno,
Welcome, and cool mod idea 
Reminds me of a better version of Reign of Kings essentially. I think I could be of help to you in this project if you are in need of more assistance. I have a good deal of experience doing Character Modeling in zBrush, and am working on a few mods for Ark myself currently as well.
I have a few ideas that I think would add quite a bit of replay value so to speak to the mod.
If you are interested in talking more, feel free to PM me on here