Pre-turn - Looking good, remove scientist in Delhi for faster growth and let Calcutta citizen work the mined grass to get the market a turn earlier.
The wines-deal with Korea is up for renewal, the cost go up from 4gpt to 7gpt and some change. But we can't afford to lose the lux.
Buy Construction and 6g from Persia for furs and 10gpt. Start research on Mono at 50% and -15gpt, due in 16t atm, our upcoming markets will make up for the loss soon.
Everyone but Japan (only Feudalism) knows the first 3 techs, but no deals possible.
We have 200g and some, so I decide to establish embassies with France and Japan (100g for both). Joan is at war with everyone!

We have 10 turns left on the iron-trade, perhaps we can join the World vs France later?
Spend 32g to speed up markets further in Bangalore and Calcutta. We still have 133g in the kitty.
530BC - Some civs starts Sistine.
510BC - Persia finish Sun Tsu.
490BC - France starts Knights Templar.
Bombay library -> horse.
Madras market -> aqueduct.
Bangalore market -> library.
Japan has a worker for sale, too bad I can't get it. We need to focus on research.
470BC - Delhi granary -> horse.
Turn up research to 90% for a turn, I will buy Mono next turn.
450BC - Carthage starts KT too.
Calcutta market -> aqueduct.
Buy Mono from Inca for horses and 23gpt. Research Feudalism at 20%.
Swap Delhi and Bombay to cathedrals.
430BC - Nothing.
410BC - 3 civs start Leo's.
390BC - Nothing.
370BC - Sumeria completes Leo's and Inca finish Knights Templar. Then Persia starts Copernicus!
350BC - Delhi builds cathedral.
I'm not very courteous, so I take the chance and make some deals:
Buy Theology from Carthage for iron and 16gpt and 7g.
Buy Feudalism from Japan for Theology, 15gpt and 3g.
Buy Chivalry and ivory from France for Theology, 20gpt.
I completely drained our economy, but we get back furs from Persia in 10 turns and horses from Inca in 15t. 3 civs don't have Chivalry, can we squeeze it out of someone? With only 5gpt left I have to use ocean-tiles for commerce temporarily.
Korea is cheapest and we get Engineering for Chivalry, 7gpt and 2g.
Sell Engineering to Japan for 12gpt and 4g. They can find Chivalry somewhere else.
Sumeria is also missing knights, but can't/won't pay, they know Invention but we can't get it.
From now on, don't research anything on deficit, we don't want to lose buildings and stuff through demands. If we get there, just use a scientist and/or work rivers and coastal tiles. But our economy should pick up in a few turns when we got aqueducts done.
Start our first Jumbo in Delhi!
Sorry for making the deals, but I really wanted Chivalry. We also got Engineering by a bit of luck.

If we have to build units, we have a 70 shield one that won't drain our economy too quickly.
Current economy at zero research on Invention: 11g in the kitty and 10gpt.
Do we want to know where Gunpowder is located first or do we want unis?