T50 update: DoF signed on the western side with Cree this turn (I offered last turn), and with Greece as of a couple turns ago (I re-offered after thinking about it for a couple turns).
I have 2 settlers in position for cities #4 and #5 next turn. As far as I can tell from the score, I should be the first to 4+ cities. TBS and Pindicator have 2 each, the rest have 3 each (including TheArchduke who also has 3 districts). Everyone else has a Campus. Comparing yields in the above screenshot I'm pleased with my position, especially after two more free monuments next turn. Here are my build plans for the upcoming turns:
Rome is building a settler (200

cost), and will have enough food in the box to remain at size 5 upon completion. The next settler will cost more than Pyramids

. I had penciled in the southern site for this settler due to the wheat farms for Feudalism inspiration. But south is clearly backlines and not all that lush (would require immediate builder labor which I don't have in the area). The western city actually has 2 wheat in the 3rd ring which would work at the current cost of 210

. That's a bit steep, but I would need to purchase one 3rd ring wheat anyway since the southern site only has 1 first ring. My current leaning is to send this settler to the stone tile 1NW of the sign between Rome and Lugdunum. That gets a 2

city center, two 2

/2

tiles 1st ring, 5-yield deer and a hill stone 2nd ring. Also the abundance of grass forest hills will become 2

/4

with lumbermills and get me to 33

base at size 8! Rome has planted an Encampment to lock in the cost, but I won't complete it until right when needed for the Military Training inspiration.
Aquileia is building the Government Plaza for [probably] Pingala's 2nd promotion for 1

/citizen. The cost is only 54

for 5

/turn. Settler costs have scaled to the point where it made sense to build the district. The location isn't the greatest for future adjacencies, but I didn't have to spend gold purchasing a tile and Aquileia's build queue was open. After this I'll likely build a builder next (with Ilkum slotted)
Lugdunum's builder will net Whales (acquired in 2 turns) and hopefully wheat will be picked up next for another required Feudalism farm. 3rd charge will likely be a Lumbermill.
Western_city will purchase 2nd ring desert floodplains and immediately start building Pyramids, ETA T71 based on preliminary projection (some uncertainty depending on exactly when Lumbermills are unlocked). Corvee policy would only shave 1 turn off the wonder completion timeline so I likely will run something that has more empire-wide effect.
Cotton_City will probably start with a Builder. I'll slot Ilkum after Rome's settler is completed and start pumping out builders everywhere so that I can put down mass lumbermills in a dozen turns. Also with more total builders I can preserve 1 charge on all current builders for a free charge once Pyramids completes.
Tech path is headed towards Construction (ETA 12-14 turns). I'm trying to minimize this as much as I can because I have at most 12 turns that I can delay without wasting culture

at Games and Recreation. I picked up Mysticism this turn so I have an envoy in my pocket. I considered dropping the envoy into the 2nd militaristic CS to the north, but that wouldn't have been enough to shave a turn off the in-queue settler. All the additional production would have been lost anyway due to the overflow-loss mechanics. So I'm keeping the envoy for now and I'll see if my scout finds any more city states in the near future.