Well played so far!
Here are my suggestions, I hope you find them useful.
Our goal should be getting the Hit wonders and Eiffel tower. Meanwhile making an army that can take Babylon and Dur-Kurigalzu in a short war, and capitulate Hammu right after that. (Should be possible in a 2-turn war). We should have spies in position to take down culture defense. We can even gift Babylon back, all its wonders are obsolete. The price is Dur-Kurigalzu, and we need it soon for the legendary cities.
We should focus our EP on next target (Saladin or Qin?)
Economy: We should be able to run 100% or near 100% slider from now on. Set some cities on research if they have nothing else to do: ~250 gold surplus is enough every turn for Sushi spread .
Orleans should build a theater immediately and change the specialists to Artists. Produce Culture here instead of Wealth if we can. Gergovia's next build should be a Salon after the Mandir is ready.
Don't abandon factories, we need them everywhere: including Nemetocenna and Calleva. We need to use the whip while we can.
Cities:
Sushi: Gergovia and Thebes . Be prepared to send one more executive if the first fails here. They must get sushi ASAP. I don't understand how these still lack sushi, even if their executives failed, they should have been prioritized more than eg. Pi-Ramesses

Apache should also get Sushi as soon as Gergovia has it.
Orleans and Paris are very unhealthy. I suggest Grocers followed by Aqueducts here. (Orleans only after it has built its theater)
Specialists: Please check specialists every turn. We don't want spies unless there is no other specialist slot. Unfortunately SoL has the disadvantega of increasing the amount of micro significantly...
We want artists in our legendaries. Other than that Priests are very good due to Angkor. With the 100% hammer modifiers they provide ~5.5 gold and ~4.5 beakers when building wealth, or 8.5 beakers and ~1.5 gold when building research. Thus they are better than scientists in most cities.
Don't start building wealth in any new city unless it has basic infra. That includes Granary, Courthouse, Forge, Library. Even lighthouse if the city has sushi resource. Eg. Poitier can build a library in 1 turn, and run a scientists after that. An immediate gain of 10 beakers for the rest of the game. (It will bring in much more when the city gets sushi)
Note about water tiles: we shouldn't work them except in Isca. We have better specialists. Only work them if we want a megacity.
War prep:
I would build some Galleons in Chartres, Avignon, maybe Memphis. Board the Infantry, the cannons from Alexandria, the two Great generals and some Muskets from Alexandria. This should be enough.
After Electricity, we should get Combustion so we don't need to worry about our navy. At this time we should be on route to Babylon. We send a Destroyer after the fleet, that should provide enough defense. Uzbek can help out with some infantry.
We should land the Dur-Kurigalzu stack first 3S of Dur-Kurigalzu. They move to Saladin's copper tile on Hammu's land before DoW. Then we attack next turn with this stack and some transports unload on one of the neighbouring tiles of Babylon. We get both cities defense down, and conquer them. This should be enoufh to cap him. If not, we should be ready with some more troops to get Akkad or Nippur.
Techs:
I would go
Electricity->Combustion->Radio->Flight
Combustion for metal navy, Flight for easier travelling to the other continent.
Diplo:
We are looking for more Sushi trades as usual. Other than that, I don't think that we will get any useful trades out of the AIs any more. So we should try and make friends if we go for Diplo.
Don't forget:
- make a workboat in Rouen for that fish 4S1E
- whip Courthouse in Amiens into Forge
- produce Culture in Alexandria for one turn (Westernmost city on our landmass) to get the crab next trun instead of in 9 turns
- (maybe) sell Qin Repl. parts for 380 gold. (Only if the other team members agree.)