I only had 1 luxury because my exploration apparently stunk as I didnt realize I had gems available until 690 BC when my curragh sailed past, and it took me a while after that before I could get them hooked up.
It was time for some war happiness. I built embassies everywhere. America and Arabia were the obvious targets to take out being non-scientific, so I declared war on Persia. They were far enough away that they couldnt hurt me, and I felt confident that immortals would still be able to take a chunk of Arabia pre-Chivalry. I renegotiated peace with both America and Arabia and tied each to an alliance against Persia.
Meanwhile, I turned research off until I had accumulated enough cash to rush libraries in several towns at once. There was a long delay between techs as I didnt discover Education until 330 BC.
I came to regret my deal with America as their troops started cutting across my land to reach Persia. I still had minimal military, and I realized I really didnt want them to declare war on me in that position, so I was counting down the turns until my ill-conceived alliance with them would end, but with 2 turns left:
America immediately captured one town and razed another, and it looked like things could get a lot worse in a hurry since my entire military was 2 horsemen and a curragh. I signed everyone I could to an alliance against America, and fortunately my friends cleaned up the American units before any more damage was done.
Unfortunately, I had lost my war happiness from America before it had even begun. Meanwhile the Arabs were faithfully keeping our agreement

. In 310 BC, I had to renew our peace treaty/alliance (I also wanted to ally them against America, but they hadnt met yet

) until they finally broke it in 210 BC giving me my first dose of war happiness. That war happiness would last all the way until the end of the Industrial Age.
Trade routes were very slow to develop. I actually could not trade with anyone until someone discovered Astronomy, and by then there was only 1 luxury available, but I gradually snapped up others as wars were declared and things became available. It took until 30 BC until I could run 0% luxuries.
The strategy through the Middle Ages (continuing into the Industrial Age) was constant Germany and Babylon seemed to be the best researchers, so I limited taking gpt from them, but I would take whatever gpt I could get from everyone else. I would occasionally take gpt from my partners to stay solvent, but I never took all their available gpt. Meanwhile, I would feed Germany and Babylon all the gpt I could. Every turn I followed the same routine turn research to 0%, buy Germanys and Babylons gold for gpt, turn research back up, and cash rush as much infrastructure as I could while keeping just enough to cover that turns deficit. Germany in particular provided a lot of cash.
The strategy went well as the AI provided Invention, Gunpowder, Astronomy, Metallurgy, and Theory of Gravity (and Music Theory, Navigation, and Military Tradition). The AI discovered Theory of Gravity just as I finished Banking. I thought the AI had a good chance of completing Magnetism before I did, but I opted to research it myself to be able to try for a second tier Industrial Age tech, but then I stupidly forgot to buy Theory of Gravity before completing Magnetism, so I got Nationalism before I could gift anyone else up

. I entered the Industrial Age in 170 AD.
All was not lost however, as the AI did get Steam Power and Medicine, and I could trade for both. My research was set to Electricity projected to take 9 turns. I needed to start my Golden Age, and I also needed more territory for science farms. Unsurprisingly, I also lacked coal, and I needed more cities to get my palace prebuild up to 1000 shields. It was time for war

.
I chose the gracious Russians as my victim mainly because I didnt want to bother with boats, and there was no way I was attacking the powerful Germans especially since I was giving them lots of gpt in deals that wouldnt expire anytime soon. Russia also lacked horses and had coal.
Not being one to fight my own battles on deity (especially when my entire military consisted of 13 knights

), I signed everyone else in against them. I paid gpt for alliances, and then sold techs to get some of my gpt back (but I never gave the AI more than they asked for, and I never broke any of the alliances). I also signed an alliance with Germany against America America had to be eliminated before the UN vote, and I wouldnt mind if Germany became bigger for faster research.
I didnt kill with a Hwacha until 290 AD which was the same turn I discovered Electricity. Fueled by my Golden Age, I researched Scientific Method and the Corporation in 4 turns each, Steel in 5, and Refining in 6. Germany provided Industrialization before they switched to Fascism

, and they eventually provided Replaceable Parts.
I completed the Theory of Evolution in 420 AD nabbing Atomic Theory and Electronics. The war against Russia went smoothly, and they were eliminated in 480 AD (I wasnt about to tolerate the existence of anyone who wouldnt vote for me

). Meanwhile Germany finished the Americans in 350 AD I sent some troops over to America at the last minute trying to snag a couple of their cities for myself, but I waited too long, and my cavalry were just in time to get a front row seat to watch Germany capture the last couple.
I got my fair share of Russian land, and I started ICSing it for scientists, but it wasnt enough. My palace was up to 1000 shields, but my research following the end of my Golden Age wasnt even close to 4 turns (Combustion was scheduled for 6 turns). Besides, there were 7 tribes total in the game (including me). Arabia would be eliminated leaving 6, so I would need 3 of the 5 AI to vote for me. If I knocked out 1 more, then I would only need 2 out of 4 votes. I was a little concerned about taking out a scientific tribe before the Modern Age free techs were allotted, but I decided it was worth the chance.
I chose Sumeria as my next victim. I think the main factor (other than the fact we shared a land border) was that they had only discovered Replaceable Parts 2 turns earlier, and they only had 1 source of rubber which was right on our border, so I wouldnt have to face as many infantry. Naturally, I called on all my buddies to join in the dogpile.
The war against Sumeria didnt go as smoothly as the Russian war did I was in level 3 war weariness by the time they were finished in 690 AD, but 8 luxuries and Arabic war happiness kept my people just barely happy without luxury spending. The turn after Sumeria was eliminated, I no longer had any real use for the Arabs, so they became extinct.
The final techs (aided hugely by scientist farms) were Mass Production in 6 and Motorized Transportation in 5. Flight would have taken me 5 turns, but with 1 turn left, someone else finished it, so I bought the final beakers. The entire game I did not get a single Great Leader - either scientific or military.
Germany and I got Rocketry, Persia Ecology, but Babylon received Fission, and I could afford it. Germany was obviously going to be my opponent, but I decided not to blow my rep for no particular reason. There were so many German troops in my territory that I got Bismarck furious then gave him the boot. Naturally he declared he captured a couple dozen of my cities on the final turn because I couldnt be bothered moving units, but I won the vote over Bismarck 4-1 for a diplomatic victory in
740 AD.
