Turn 305 victory.
I feel like I've dodged a few bullets and was just plain lucky: started with a worker, and the second ruin was +20 culture, so didn't need no monument (got it from legalism

). The next turn I met two religious CSs for 8 faith each, and founded the pantheon without any shrine. I think the first 100 turns I only had wonders and free buildings in my city. Still, I have no idea how people finished under 300 turns. Just donating all the money for charity to, maybe, get DoFs and RAs?
Did you use your UU?
I think I had only 2 bowmen. Donated one to a city state to help with Mongolia. The other cleared a couple of encampents.
How useful was your UA?
Absolutely fantastic. I've never had that many great scientists. I planted 5 and expended around 15.
Did you use spying to your advantage?
Not really. I belatedly realized that I had to fill the bottom of the tech tree in the end. Since Industrial Era, I was at least 2 eras ahead of everybody. I could have shaved a few turns with one or two spies just picking up legacy tech I haven't bothered to research. Otherwise, I used a high-level spy to protect the capital and the rest to rig elections.
Did the map type help or hinder victory and how?
I think it wasn't the type, as much as the specific map: most CS's coastal and the starting location relatively secluded. Both facts helped a great deal, but I've seen plenty of Continents maps where this wasn't the case.
How did the difficulty level affect your game decisions?
I knew that early wonder-slutting was pretty safe, so I prioritized early wonders.
Was Faith helpful to achieve victory? How? Did you build any faith wonders?
Somewhat. I bought 4 or 5 great scientists with faith + ~70 gpt from tithe.
No faith wonders.
What Social Policies did you choose and in what order? Which Ideology did you choose?
Full Tradition, opened Commerce, opened Patronage, 3 policies into Rationalism.
Adopted Freedom and beelined space procurement, picking all the policies that favor specialists.
Beeline scholasticism, added the penultimate policy for Rationalism.
Add more policies to Freedom to get +4 influence for every trade route.
Finished Rationalism for free Ecology (I probably waited way too long to finish this one).
Finished Patronage.
Finished Commerce.
What techs did you prioritize?
Writing -> Currency -> Education -> Navigation -> Scientific Theory -> Radio -> Plastics -> Penicillin -> Satellites -> The rest of the techs required for SS parts
How many academies did you build?
5