Here's a list of Civilizations I would make without altering the unit costs or heath.1.) Imperial Rome2.) Byzantine Empire 3.) Holy Roman Empire 4.) Medieval Briton 5.) Medieval France6.) Mongol Empire 7.) Norse 8.) Aztec Empire9.) Ancient Chinese10.) Ancient Japanese11.) Samurai Era Japanese12.) Templar13.) Caliphate of Cordoba14.) Egyptian Empire 15.) Spanish Empire16.) Zulu Empire
But I do not know how to mod that well but I will try my hardest so I would need help with files and programs I would need. I could go on for day's about content i would add like this.
I'm home 24/7 so I could mod the game all day and night if I had to.