For my earlier writeups see first and second spoiler. Here is only a wrapup of the final phase (which took around 10 turns).
Taking the 8 Mongol cities with Cavalry was a piece of cake. They were defended only by Pikes and a few Muskets. In the course of that campaign I got two MGLs -- now that the game was almost finished...

. As I had no real use for them (no great or small wonder currently available, and I knew it was only a few more tiles till dom limit, so no need to save them for later wonders), I created two Armies.
After that I spent two or three turns healing and repositioning my Cavalry and then used a ROP-rape to take five French towns in a sneak attack. Originally I had planned to raze the cities and plant new ones, as France was culturally advanced, but I knew I would need to hold on to those cities only for one or two turns, so I didn't bother. I used the settlers, which I had already prepared, to fill in a few gaps and to put me 20-30 tiles over the dom limit. So even if one or two cities would flip back in the interturn, I would still stay above the limit. Then I hit enter and reached domination in 1060AD. Jason Score 10349.
I just saw ignas' spoiler that he posted earlier today: domination in 210AD!!
Good job

! I really wonder, how you guys do it...!
civ_steve: in this game the happy people of China called on me and enlarged my palace about a dozen times. This has never happened to me in any GOTM/COTM. Is it because for GOTM77 you forgot to "disable" this feature, or had the quality of my play just been to lousy in the earlier games...?
Cheers and thanks for making my current vacation most enjoyable!
Lanzelot