So did you get through the game yet? because I'm taking it as a challenge, and I'm not sure I'll manage to dig out of this pit.
Update: It's 1530 AD, turn 296/540, and I've decimated France, making peace for a world map, Physics, and some gold. France has 1 city left. Finally made contact with the last civ (super-backwards Persia), and I am about to research Military Tradition. The best news: Inca and Korea have a MPP, the Inca attacked me, and I allied with Japan against the Inca, triggered Japan taking the brunt of both of those civs.
When my Alliance runs out my cavs will be waiting on Japan's borders. The only major problem is Japan is in the Industrial age, with railroads. I am still in the Middle Ages.
1605 AD, I've finally declared war on Japan again, after their position as the dominant runaway since before 770 AD. I made some MPPs before war, and some MA's after, and I expect most of the world to be pulled into this. 1st turn sees me taking Bergen and Reykjavik.
4 turns later I'm overwhelmed and will see the loss of my two gained cities.