Update on the Small(60% Pangaea)/Demigod/Spaceship with the Sumerians (Korea, Greece, Germany):
I am at 600AD, in the IA. I have Steam, Industrialization, Medicine, and Sanitation. I am currently researching Electricity, and I currently doing research in about 4-5 turns a tech in the IA. However, this is quite dependent on GPT trades with the AI civs. I was at war with the Germans for a long time, and I was only getting 6-7 turn research while running 30-40% lux tax. At peace, I can get by with only 10% lux, and my tech lead can be traded to the other 3 civs for around 100 GPT. However, the $$$ keeps getting smaller. I might have to go to war with Greece to reduce their unit support.
In any case, I managed to expand well at the start with a few worker/settler factories (Ur, Sumer, Lagash), and I survived Greece in their GA since they attacked and crippled Korea instead of me. I got a SGL too late for any interesting wonders (missed Pyramids, Oracle, SoZ, etc.), so I used it on a quick FP in Erech. This lead to a good boost in research and $$$.
Germany, however, had tons of room to expand into, so they got too big for their britches. In their GA from wonder builds, I had an early war with them that they started. I lost 2 cities, but started my own GA. After the war, I hooked up iron, and was able to get Knights. Germany was without Iron or Horses at first. In fact, Germany did not even have contact with Greece. I did get Copernicus' Observatory in my capitol.
Later on, I started a war with Germany (after a BIG GPT deal for Education? Astronomy? was up). This got me the territory I lost from the first war, plus a few more cities and a MGL, which I used for a Knight Army. Salzburg was hard to hold, and I was still outnumbered by quite a bit even with superior troops, so I went for Peace. Using prebuilds, I also got Newton's University in my capital the turn I researched ToG. This will be very nice for research with a size 20 capitol.
Later on, they had Iron, Horses, and Saltpeter. I found their horses and saltpeter and pillaged them with my Knight Army.
However, they were trading with Greece for Iron (after contacts from Printing Press). So, when I started a third war with them, and brought Greece into it this time. Germany lost all three strategic resources in just a few turns. During the 3rd war, I must have defeated 100 longbowmen, only netting 2 MGLs. I used one for the Military Academy, and the other for another Army, this time with Cavs. The war lasted a long time, because I did not want to have to go to war again later, due to WW. I only kept a few cities, especially Konigsberg with Sun Tzu's. Most of the rest I razed and resettled. I went in order of arrows: red, orange, yellow, green, and blue.
Here is Ur at 600AD. It should be really nice in a few turns once the Hospital is done.