Good job on the reports and thought sharing, makes it easy to follow and certainly encourages more responses. Keep it up

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Thanks! More responses is what I'm looking for. I'm here to learn.
2nd city between sugar and horses seems good to me. Maybe even 1S on the jungle tile, but that might be a bit too cocky. Because of horses, but mainly to block off Joao. AI love their calendar resources and you can be sure he will have an eye on that spot sooner rather than later.
I could see settling on the jungle as it wouldn't really change my plans for the rice/sugar city by much, and long term it could be great after I can spare worker turns to clear jungle. Would like to know more of what's in the fog first, but I think you're right that land grabbing is essential here.
Barbs will become a problem even before you can hook up the horses, but I don't think Archery is necessary. At least 3 warriors in total before the settler seem in order though. The first one could go to the north, there is a forested hill 1S of the silk. That should keep you safe from that direction. The scout is also doing a good job, make sure to stay in the vicinity. The other 2 warriors can approach sugar/horses. The mountain chain helps aswell. So settler will probably come at size 4. I hope that's not too late.
Warriors alone make me nervous on Deity, but I think you're right. By the time The Wheel is finished and the worker has built roads and pastured the horses the barbs will already be headed my way. I'm less concerned about the North and West, and more concerned about barbs from the South/Southeast. One of the warriors might be sent to one of the southern jungle hills.
Looking at the AI situation, I would advise BW next. To whip the next settler and start chopping as soon as possible. If the enemies were a bit closer, even AH could have been skipped. But finding horses is good I suppose. Otherwise it would've been just one grassland cow for the near future, which is a bit meh. It's important to grab space now though, otherwise they might force your hand at an early rush. Better to keep options open and get enough land yourself. Wheel-Pottery definitely seems too slow. Grab the land now, pay for it later.
I see the logic in this. Chops/whips probably shouldn't be delayed at all in this situation with a strong REX ai like Joao nearby.
As for expansion, along that river seems good to me. 1st settle = sugar/horse, 2nd settle = rice/sugar. They will be connected to each other by default. So you will only "lack" one trade route for a little while (to the capital), not too important. I would make that marble a priority. It doesn't need any food.
I could see settling 1SW of the marble (to preserve a fish city) as a resource grab for city #4-5 maybe, but how strongly do you think I should prioritize getting marble on Deity without at Ind leader and knowing that HC is one of the nearby AI? I assumed conquering wonder cities was the way to go on Deity, with the exception of some games where Oracle, GLH, TGL, or MoM, are critical. I suppose it might be worth prioritizing just for the opportunities at better failgold? At any rate, without food this city would just work some cottages or be a worker/warrior pump, right?
Commerce isn't great, but it could be worse. Those river tiles will get you to Pottery at least. Then you will be fine. There is decent space for cottaging.
Agreed, looks like I will be cottaging most everywhere, not just the cap.
This is Continents so it's likely that the other 3 AI are on their own continent(s) then?
Yep. Although I have played continents maps where the split is 5-2 or even 4-2-1/3-3-1.
I forgot to mention, and it is worth noting: Both Buddhism and Hinduism were found on my continent, and, oddly enough, Hinduism went first to HC, then Buddhism to WVO. I guess we'll see which way Joao goes. It's unlikely that there's any zealots such as Izzy/Justin/Gandhi on the map.
Long-term strategy would be between Engineering bulb and Astro play for me. On a good day you could lib Astro and go from there. Too early to tell though. I like the Engineering idea though.
This is one of the things I'm most eager to learn. More often than not my play on Imm is either elepult, curriasiers, or cannons, but I see so many Deity players and SGOTM teams win with classical/medieval strategies that I'm not familiar with. I'm hoping it's doable with 5-6 cities, because I'm not super confident in my ability to get much more than that.
Hope other people chip in and offer some different perspectives.
Absolutely! Thank you for your feedback Lain, and I look forward to hearing from others and soaking up all the advice I can!