Good question. There are at least 3 scenarios: copper in FC, copper nearby, copper nowhere close. Now if copper is close, is it possible to conquer the map in the BCs?
I'll be trying a few tests before playing too, I think.
I generated a few maps in WB, and about 9/10 of the time there were 4 x Copper in the southern belt, so I think the chance of Copper nearby is decent. (There was also much iron in the centre if not, although an extra 429

will be required).
Finance may be more of a concern. I tried GreatBeyond's test map and despite lots of generous goody huts (about 150-200

in total at the beginning) my no-frills axe rush* ran out of cash around turn 134 (490 BC) with only 2 rivals eliminated, 2 hobbled and 2 untouched. City maintenance already accounted for more than half my expenses.
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* (2 initial cities; built warrior, worker, settler, worker, 2 x barracks, 25x axe...)
So looks like CoL for courthouses (and merchant specialists) will probably be necessary, plus some kind of early financial infrastructure. Possibly:
- cottage city on the river to the SE (around +15 gpt by turn 100)?
- Oracle - for CoL? Philosophical trait also means this gives a GP after 38 turns, which could settle for +5 gpt, or build a shrine if there has been much religion spread. Does anyone know how much empirical difference the Shrine makes to the spread of a state religion? Missionaries are expensive... (60

)
- Fishing might also be useful for working that freshwater lake and other

water tiles in captured cities to the north... (would have given me at least another +10 gpt in my test game).
I also got good mileage from early DOWs on southern neighbours, for worker steal and leaving woodsman warriors fortified in forest next to their unimproved copper. This crippled the AI for a long time after, while I dealt with the northerners...
LtC - anything interesting from any of your test games? Anyone else still experimenting?