Just won for the first time on Deity with Montezuma. I wanted to go for Domination, but then midgame I decided that I can go for a Science win.
Had Ghengis Kha right next to me at the start who just rolled over every citystate. Everyone declared war on him and I took his Capital which had a lot of good wonders. After that I tried to take the persian capital once with a lot of paratroopers and a couple nukes but didn`t manage to deliver the finishing blow it was ridiculously close tho.
Then pretty much nothing happened, in the end I knew Napoleon was really close to winning most likely even in front of me by 2-3 rounds, decided to send a raidingparty of 15 X-Coms and just raided everything of him - destroying his production. When I won I saw his last stationpart moving to Paris