One thing I forgot to do on my last save - trade metal casting for philosophy to Joao.
We discover Paper, bulb education once and discover it a few turns later (780AD).
At this point we are out of cash reserves and cannot perform any more deficit research.
Our tech rate is pretty poor for this stage of the game:
You can notice on the screenshot that Qin is 2 turns away from Nationalism. He doesn't have marble, but he can still beat us to Taj.I am planning to bulb liberalism and pick Nationalism for free.
In 5 turns we get another GS (I hope we won't get the 7% chance of great artist)
2 Turns later, it appears that Qin is willing to trade Nationalism. Apparently he is not planning to build Taj Mahal for now.
At this stage I cannot trade anything useful to him. He doesn't have paper so I cannot give him education, which is the only tech that is worth as much as nationalism.
Also, I need compass before I can bulb so I trade it to Gilgamesh for paper and world map.
At this point I see (because I was lazy to explore before) that Gilgamesh only has 5 cities, so I feel safer trading education to him - he won't be able to build oxford for now.
I stop researching liberalism because I want the scientist to bulb it but not finish it. I start researching nationalism partially so that Qin will be willing to trade it.
880AD - the GS comes and bulbs liberalism (2 turns left after bulbing). In the meantime Qin has researched paper.
Tech status:
I make the following trades:
Education+compass to Qin for Nationalism
Education to Gilgamesh for machinery and music and 40 gold. He was willing to give some cheaper techs as well in addition, but I say no thanks, I don't need an early WFYABTA.
The capital immediately starts working on the Taj. I starve it a little to get it fast and chop 2 forests.
2 turns later we bulb liberalism and take military tradition as a tech.
Next I reasearch gunpowder, helped by a golden age.
At some point Qin requestes me to stop trading with Boudica (I have give her some excess resources for gold). I agree and change her attidute from Annoyed to Furious. And now she refuses to talk.
2 turns later Qin sign a peace treaty with her!!! Now I am guaranteed to be attacked. I better be ready with some army soon.
I make a defensive pact with China to help me in the future war with Boudica. The good side is that I don't need to attack her. She will attack me and Qin will send some troops to help. I should be careful not to let him catpure any cities.
1010AD - golden age begins, taj mahal is complete. Thanks to the mausoleum I have 12 turns. I switch to caste system/philosophy for 5 turns and try to get a great merchant. I starve Hari for maximum GM, and get a great mechant in 3 turns (lucky 37%).
I only get 1300 from the GM. No one of my friends has a really big city.
I trade liberalism for theology with Gilgamesh, hoping he would switch to free religion and become friendly, but it doesn't work. Still he is not at WFYABTA yet.
Some more tech trades:
Gunpowder to Sumeria for guilds.
Gunpowder+guilds to china for printing press.
After 5 turns of caste system I switch to serfdom/theocracy/bearocracy for 5 turns. I also notice that I was too stupid to build only 5 elephants so far.
I upgrade them all to cuirassiers. 2 turns later boudica declares on me with a massive SOD (Qin declares immediately on her due to our pact).
I want to revolt into nationalism, but I have to wait 3 more turns.
I am also not in slavery, so cannot whip.
I manage to build 2 more curassiers and send them to my marble city ankgor thom, but my army is too weak for boudica's SOD. Her stack is mainly horse archers, some knights, some melee units (no pikes or spears luckily), crossbows and catapults.
With such numbers I must have siege. I only have 1 catapult now, so I start building them in a few cities.
I reach the inevitable conclusion that I must retreat from Ankgor Thom and let Boudica capture it. I leave 1 axemen there and she spends 2 turns breaking down the defences.
I trade military tradition to Qin for consitution, and finally switch to slavery/nationalism/consitution and start whipping cats and drafting mustkets. Qin arrives with his SOD. Together we clean up boudica's SOD with hardly any losses (3 catapults, 1 curassier 1 pike).
This is great, most of her offensive army has been lost on our cultural borders - no war weariness.
In addition Toky declares on Qin, which means both of them will be busy and I can take Boudica.
I capture Angkor thom next.
I get a great scientist and start another golden age, my plan is to gear up for the offense quickly and take boudica with curassiers and spies.
I will build/whip some jails so I don't think ammassing EP will be a problem.
The war with Boudica is easy. She has just researched gunpowder, but muskets are not a good counter to cuirassiers. She doesn't have a lot of pikemen either. Most of her army is horse archers that she promotes to knights.
There is one big mistake I made in this game - I was too lazy (again) to send a workboat to map the continent. I didn't realize boudica was so far and just had 2 cities near my borders, and Toku was behind her.
I sign peace, and then make another stupid mistake. I declare war on Toku instead of Joao. Why do I need to take on protective longbows and a huge army in general when I can attack Joao who has great big cities that would bump my economy?
Anyway, I soon realize that Joao beelines rifling, I manage to capitulate Toku and then I immediately declare war on Joao. I capture 1 city and I am forced to sign peace.
Later, the apostolic palace (Gilgamesh) gives him the city back. I don't dare to defy since my economy is in a poor state anyway.
My maintenance is very high, my cities strech too far. I need some infrastructure before the next war.
I switch to organized religion and spreed the AP religion to all my cities. I trigger another 12 turn golden age with 2 great people and switch to free marker, so that I have trade routes with China (I ran merchanalism previously).
I stay at Nationalism for espionage bonus. I whip courthouses and jails in all cities and run espionage slider.
Spies in china brings me a lot of important missing techs: scientific method, biology, communism (whip intelligence agencies everywhere), and finally rifling. The cost is really low, china is close, has our state religion (-25% for our holy city), trade routes (-20%), and we have the highest espionage spending for an additional 20%. The total is that a spy who stays 5 turns in a chinese city gets a mission at less than 1/3 original cost.
During the golden age I build wall street in Paris and Oxford in Hari.
I attack Joao with an enourmous amount of cannots, rifles and cavalry and a lot of losses. The war is very quick and I capture all his cities.
Before the war I switch to AP religion and make sure Toku switches too. In the middle of the war I am elected leader of the AP.
After eliminating Joao I just wait for border pops to win, and china attacks me. They were friendly all the game, and I was too tired to notice that with all the espionage and declaring war on their friends they became annoyed. They have infantry and artillery...
Luckily, the AP resolution comes next, stop the war. The chinese capture one city and then the war stops. I am planning to get it back in the next vote, but I don't get a chance... I win domination before that on 1806. I think it's the latest one amongst the players here

but still, a win is a win