Thanks for posting this (and to the others for contributing)! At first, I thought this might be some kind of prank like a WorldBuilder thing where you start getting into a serious game and then find someone has Riflemen from the get-go
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In any event, I see some similarities but a radically different start strat.
From the start, I was able to see the coastal border to the north, so I elected to move my warrior SW, immediately exposing the hut there. I didn't like the start square because we were covering the only irrigatable square and I prefer the immediate river commerce with Financial. I could see a lot of the coastal boundaries and mountains, so I moved inland NW, exposing the cows and confirming the territory boundaries. I elected to settle NW of the starting space.
From there the game plays out very differently already. I don't have Alexti's coast, but I have a lot of real estate I can work and I'm inclined to Cottage Spam. I'm stuck at 80% research and selecting a worker reveals that researching BW leaves my worker with no useful tasks for several (6, I think it was) turns. I researched Wheel since I want Pottery and I want to hook up the cows ASAP.
My warrior uncovered a scout with that first hut which proceeded to expose the S/SW (meeting Cyrus and beating him to a 2nd hut for a useless map of the ocean). The warrior proceeded W, trudging through the jungle and only missing a 3rd hut by a turn

Miscellaneous animal skirmishes in protected squares with no casualties.
I completed Wheel and seeing no reason to change, I pushed to Pottery. I completed my worker and mined the river hill since it draws commerce (faster worker/settler production also since it offers 4 units). I then roaded up the sugars and cow. I'm building my settler the old fashioned way. Upon completing Pottery, I cottage the sugars because they are 3 food and I can't work them for a good while yet. I focus on commerce over shields/food to keep research high and a single-digit treasury. I'm able to crank up to 90% research and sustain it. I switch to AH to work the cow.
Can't remember which finished first, I think AH. With the horses revealed, I pre-road to my new build spot 4 S of my capital. This gives me a coast, *improves* the tile I'm on and puts me 1E of the horses. I park a fog-buster on a wooded hill in the area and shortly settle at my designated spot.
I research Hunting->Archery for city defense (I see barbs and win a battle or two) and because I want Horse Archers. I research Mysticism to build an obelisk buffer in my new town and to make it possible to trade for religion techs.
My new city builds a worker, an archer which I run back up to my capital and then starts an obelisk. I intend to spam workers to help spam cottages and pre-road forests/jungles. I want the pops low and I'm going to need a lot of cutters.
Caesar shows up and we make nice with Open Borders. I turn around and get Cyrus to offer me open borders also (nobody has any religions available, but they've been founded late as others have noted). I wrap up Horseback Riding and belatedly research BW and learn the bad news.
I go to Fishing->Sailing since I want Compass & calendar and it's becoming apparent that there's no future inland unless my HBR tech edge overwhelms Cyrus. I know that he hasn't hooked up the copper, but I've no idea what the iron situation is, yet.
I chop the river forest for a settler and to place an interim cottage as I will be killing my sugar towns when Calendar comes and I don't want my economy to die out. Eventually, this square will probably be irrigated to spread farms if I can't do anything with the jungles..
Caesar offers me IW for HR. I see he's got Sailing (2 turns for me), Masonry, & Writing available, as well. I waffled here. IW has a lot of immediate advantages, but doesn't lead anywhere I can go in the near future. Masonry + Writing have the same cost and Mathematics would put me within spitting distance of either Calendar or Construction. This huge boost to catapults and the Great Lighthouse/libraries/plantations push me that direction instead. Hopefully, Caesar will be more inclined to harass Cyrus than me (crosses fingers).
At 775 (I missed my 800BC cutoff), I'm 2 turns away from building my 3rd city on the northern coast the hill cove next to the lake.
I'm still runnning 90% research on a balanced budget with a treasury of 11. I'm generating 32 coins/28 beakers, I've got an unhappy citizen in my capital, Pop 5 (a weak area in my game, I admit) and my new town is Pop 2. My terrain is over-developed for my needs but allow me some flexibility in switching to production for wartime. I've designated my capital for barracks (no shields in it yet) with the intent to start chopping/popping out Horse Archers for a rush on Cyrus. If I can bribe Caesar into warring with him to drive a stake in their relations, I might win Persepolis and all the intervening terrain.
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That's the plan, anyway. Any thoughts?