I wasn't looking forward to this round. I normally give up in my games when it looks like I'm heading for 0% research and still losing money. But actually, thing's have been left in a pretty good state.
35 AD Got rid of that swordsman, it only had 9 hammers so far. Switched it to lighthouse or library or something. Moved a couple of citizens around to get some progress on some cottages for the sake of one hammer here and there. Not that big a deal, could only find 2 cottages unworked.
IBT Library completed in Pasargadae, started turning hammers into research. This and some minor MMing elsewhere dropped the time needed for CoL down from 14 to start with to only 9 from now on

(Approximately. It depended on upcoming library completions as well).
80 AD Got a popup that J.C. has cash to trade, so he must have currency. I got a mod that tells me when cities grow, when AI have cash or gpt available, stuff like that. Nothing I wouldn't know without looking, so it is legit. Anyway, this means Rome is getting rich, and could steamroll ahead of us.
155 AD With that in mind, I start considering tech-trading with some dubious characters. Gave away Literature for Monotheism and 110 gold. Whacked the slider all the way up. Swapped a couple of citizens around. Code of Laws is on it's last turn now.
IBT Cathy demands Literature... yeah, right. She's well piffed at us now. Code of Laws done, gone for Construction next. Looked around, couldn't find any good deals yet.
170 AD Still thinking we have a chance at Great Library, got nothing else to do in Persepolis. Where's the marble? It's quite close, we could drop a settler near to it (see illustration). Persepolis could have pumped a settler out pretty quick in 5 turns. I found a quicker way though
"Why, Bismarck, that poor little town you call Essen is not doing very well, is it? Would you like us to take care of it for you? No? Well, your opinion is duly noted. We're taking it anyway!"
I wake up and send the best of the best to Essen's door. Some of our towns on the west coast are unprotected now, but I left at least one unit in our northern bordertowns. That might not be enough, I'm taking a big gamble with the moody Tsarina.
200 AD There's a lot of money floating about among the AIs, I just had to capitalise:
CoL + Lit to Mansa for Currency + 360 gold
Mono to Bismarck for 200 gold
CoL + 20 gold to Hatty for Calender
Started plantations on dyes to up the happy limits in some cities. We got a very reasonable income boost from the extra trade routes with Currency. You can see in the next screen how rich we are, but there are also problems.
I've taken the save right after those tech trades, so I've not gone round the cities to sort out their production lines. All I've done is stuck courthouses in front of everything, even when their previous items are almost finished.
There's 4 Immortals waiting outside Essen, and an axeman 2 steps behind them. You've only got 3 archers to take down, one of which has a garrison promotion. It shouldn't be a problem, though, one of our immortals is only level 2; throw him at the garrison, then the other 3 elite immortals should survive. You'll see what I mean.
And one more thing. All the cities obviously need an overhaul. I couldn't be bothered, sorry

I must have done something right, so far, we're second in score.
P.S. Watch the worker near our capital. He's pre-chopping a forest, he will finish in 2-3 turns. I got it ready for the GL. The health limit is very high in that city, so we can pre-chop the other forest as well without suffering.