Meh, I missed that the deadline is so close. No way I can play this in the next couple of days.
If someone is still having a go, my recipe for a game like this would be:
-Play Boudica, marathon speed
-Start by moving settler towards center of map a few turns, to get closer to the AI and only leave empty room behind you that doesn't need to be cleared.
-Find a hammer strong spot and settle.
-Spam warriors, steal some workers.
-Warrior rush the first one or two (or three?) AI:
- Wait until they move out first settler. (Use espionage screen to find out who is building settler.)
- If you declare and move in diagonally next to city same turn settler moves out, settler escort will not return to city (settler will)
- 10-12 warriors is usually good for non-hill city with 2 archers and 20% cultural
- Sometimes they move out 2 archers with first settler, then 5-6 warriors is enough
-Once you have first city captured, you can start using city gifting shenanigans to have them move their defenders out. (ctrl+click scoreboard to open trade screen if diplo screen doesn't allow any trading option yet.)
-Eventually connect some strategic to kill the last guys.
Shouldn't be any need to tech further than AH and/or BW. Workers improve a couple of resources, then mainly build roads towards AI.
Taking out one AI with warriors is actually quite easy. You only need to build them, then walk in at the right time. Taking out two AI is doable, but requires some luck.