I scouted WK and decided to start the war asap. Queued some L-bows in old HC's cities so I can whip them next turn and send chariots & Cho-ko-nu's on front line. Traded Edu for Banking with Lizzy and told her to research Const. Got another GEng and decided to hurry Versailles in Tianjin and send other one in Cuzco to hurry West Point soon. Switched research to Econ, still few turns binary. In 1020AD got Versailles, sold PPress to WK (he had 2T to go) for 110 gold, DoW'd him and came next to Seoul.
He attack my stack weakening his defense in his capitol, but he weakened my stack as well - so I spent 1T bombarding and healing while 2. GEng hurried WPoint in Cuzco (720 out of 800 hammers needed). In 1140AD finished Taj, started GAge, captured Seoul (loosing treb & cat) and he capitulated. Traded him Guilds for Compass, he can continue researching SMethod. With the gold I got from capitulation I upgraded 3 chariots to cuirs. Converted to Hindu, I'll wait for Econ to switch civics. And yes of course, I'm still building temples & forges & c'houses and last 3 missionaries.
Traded Edu for Optics with WK and gifted him Seoul back. In 1160AD got GMerchant from Econ - he'll wait ~6T for next GP. Switched to Rep, FMarket & Theo. Lost my marble city to Lizzy's culture (didn't know that's even possible from vassal) and started moving my stack toward SB after they healed. Traded DRight, Philo & Banking for Astro with WK while researching RParts. From here onward I kept research at 50%.
In 1200AD SB capped Ragnar, I DoW'd him, split my stack in 2 equal parts and turn later captured 2 of his cities, loosing 2 trebs & cat. In 1220AD got another GEng! They'll wait till last turn of GAge to prolong it, in case I change my mind.
In 1230AD WK finished SMethod (traded him RParts & Nat) and Lizzy finished Const (traded her GPowder, Lib & MT). Told her to research Democracy and had to gift Chem to WK so he can research Steam Power. Turn later SB came with his stack on the open and I smashed it with such a joy! Researching Rifling.
Lizzy tried yet again for diplo win, but now I have vast majority of votes and I'll abstain forever. In 1270AD captured 3. SB's city while researching Biology. I just can't stop teching! I upgraded ~ 15 units to cavs and went for his capitol. Captured it in 1290AD. He has 3GG's settled there, so that finally takes away his 4-promo units - now I don't need trebs anymore, cavs should be enough to get him faster. Too bad all that didn't happened few turns earlier; he'd cap by now if he didn't cap Ragnar. If I listened to advice and went all in on units...now I sent WK to attack city S-SE of SB's capitol and Lizzy SW. I'll go NW-N, toward Ragnar. Got 2. GMedic, that'll speed up things.