I played on till about 1700 AD. I think this game is mostly in the bag unless something horrendous happens. Basically I'm setting up for a modern war to cripple the two AI that are still teching. Or I may just beat on the backwards civ and settle down for an SS win. Either option is open right now and it'll depend on how fast I can get to assembly line/combustion.
First my current tech screen:
And my VC screen:
I've crippled Vicky but haven't bothered to finish her off yet. She has a 1 tile island city and a tundra capital - neither of which are attractive enough to bother warring (and she's a target for her neighbor

). Darius has got himself into an unwinnable war (surprisingly) and MM is just teching alone. I've gone up a different tree from MM but we're roughly even in techs. He may be ahead by a bit.
So I settled on the same square that you did - on the silk. I built New York near the stone/cow and went masonry very early to hook up the stone. I got stonehenge + pyramids early, and also got... the lighthouse (not very useful for this map), hanging gardens (useful), Shwedagon Paya (early FR was very useful), UoS, and the Taj. I missed out on the other wonders as I just wasn't able to build them fast enough. I was close to getting the SoZ (1 turn short).
I played with 3 cities for a VERY long time. I should have gone CS earlier since I was essentially playing a modified OCC game. I put Moai in the capital and later built the NE there as well. New York was a very mediocre city - not much production and not much commerce. However I used it to turn out the few settlers that I did use. Boston was supposed to be a draft city but I realized that I didn't have enough hammers to build the globe so I gave up on that thought.
I made fairly early contact with MM because of Boston's borders - I traded a few techs since I was basically beelining liberalism. I took nationalism off of it since MM finished education and I had traded him philo. I got really lucky and popped astronomy off of a hut (first time!) when I settled the horses south of MM on the ice. I've built almost all of my cities coastal but they're all pretty crappy because they lack production - I wish I were Willem...
Once I got astronomy + MT + gunpowder, I built some cuirassiers and attacked Vicky. She was extremely backwards (no engineering) and only had LB defending her city so I took over the island she had settled with 6 cuirassiers

I then took one of her mainland cities and took peace as I was running out of troops (I was basically building all of my troops out of Washington).
I then teched rifling to protect myself (draft rush if necessary) and am now going towards AL/combustion. I will get factories in Washington and NY. Probably also the ex-Vicky lands as that's much better than the tundra crap that I started on. Most of my initial cities are... still building old infra (useless). Since I'm going to be production limited, I will probably wait till destroyers/infantry before attacking Ramses and Survy to pick up more land. I imagine at that point, an SS and/or domination should both be possible. The tech rate is very slow on this map as almost all of the AI started isolated (the pair that didn't were at war). MM has 5 religions so I imagine he'll attempt a radio beeline and shoot for culture. That leaves me with about 100 turns to take out his core cities which shouldn't be a problem at the rate I'm going. I'm still running bureaucracy and will probably run it until the end of the game. I think that's a first for me.
I've attached the save in case you want to look.