Extra condition in both games: "Stick to one wife"
My first try on Hard(724):
I wasted alot of time in the end (without noticing) by flying around and keeping my army restocked from the capitals.
My second try on Impossible(1454):
I didnt finish the demon world with closing the portal, since it would have taken another Game Day to fly over. And after 2 Play throughs after each other i got tired of the game so i just wanted to finish it
(No cheating involved, if anyone is interested in the savegames i can attach em here)