Thats a new one. From experience in most game some emperor tier character will eventually turn undead creating a giant hoarde with 500k+ troops no one can attack until many decades later until attrition has worn them down. And even then every sub undead lord has 50k troops or more remaining.
@TurtleOfSteel Sorry, I can't help out as I am currently too busy. Maybe some small things if you want to outsource them, but I have no time for continuous development.