I made a first pass at settling corn, then coast, then stone, then pigs and the dates were
c1 t0
c2 t36
c3 t50
c4 t62
c5 t72
That can probably be improved a bit, but it's not obviously better and doesn't support the pyramids attempt very well as the extra cities slow the tech rate and we get maths later...
Anyway, we'll see where horses are in a couple of turns (maybe tomorrow...) and I think that'll help inform the dotmap a bit more. I like this one best so far and both my proper sandbox runs have used it:

This one has merits too, I need to try it to see if the pigs city develops quicker:

And this one is in case we decide we need a couple of extra cities in the same space and we don't mind if some cities don't have food.

Completed: RB Demogame - Gillette, PBEM46, Pitboss 13, Pitboss 18, Pitboss 30, Pitboss 31, Pitboss 38, Pitboss 42, Pitboss 46, Pitboss 52 (Pindicator's game), Pitboss 57
In progress: Rimworld
In progress: Rimworld