Actually, I decided to play this one first since it's such easy sailing.
Inherited turn: Just one complaint, why are all the research labs due in 3-5 turns? I always time prebuilds for them (Battleships and Coal Plants work well.) Also, why're so many of our cities up at size 23-24? Beyond 20 doesn't help anything (no, those 20 scientists are not helping our 2000+ beaker production.

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We renew Persia's 10 gpt for Dyes deal. We're still paying 4gpt for RoP with him, but that's fine with me.
Hmm, why do we still have 10% luxury tax? Well, yeah, we need it, but why? Hey, we have only six luxuries - and there AREN'T any silks or ivory in the world. Sulla, did you get a bit too enthusiastic in editing the map way back when?
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Xinjian completes SETI as scheduled. I convert irrigation to mines almost everywhere, and build settlers out of the overpopulated cities to transfer to lesser-populated ones.
Some weird math is going on: in 1375, the ticker still shows 2 turns to Fission (it hasn't gained any.) Setting the science slider to 10% shows 235 beakers per turn, Fission due in 9. That means we need 2115 beakers, right? With the slider at 90%, it shows 2158 income being allocated to science, but it still shows 2 turns.
Well, I can get the tech in one turn by pushing the slider to 100%, and lowering the lux tax actually only necessitates hiring about six entertainers total, half of them in Krasnoyarsk.
For Rocketry, Xerxes wants Fission, our treasury, and 316 gold/turn. Sorry, bro, you're asking a bit too much there. He'll pay us 174 gold/turn for Fission instead, though.
I set research to Nuclear Power. He'll need that eventually, and I wouldn't mind having Synthetic Fibers be the last of the techs that X gets.
(Can we steal a tech from Xerxes? Or, would anyone object to gifting Babylon up into the modern age so their free Rocketry lowers the cost for us?)
Xerxes starts the UN in Persepolis. I pay to investigate, and it's due in 28 - we're fine.

(The prebuild for our UN got started a bit late because of the Research Labs.) BTW, Persepolis hasn't built a hospital. X-man has all six luxuries and at least two each of all eight strategics (including SEVEN horses).
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I selectively upgraded some infantry (we don't have the money to upgrade them all.) Also, I built a bunch of fighters, since bombers will be really bothersome if we do find ourselves in another war.
We can run 100% science, if you're careful to check cities for happiness. When we don't need 100% science (like right now because Nuclear Power is due in one turn), run 10% lux to be on the safe side.
For Xerxes' birthday, Nanking is going to finish the Manhattan Project so he can build nukes.
http://www.civfanatics.net/uploads3/RBD19-1400AD.zip