Im not sure about having different variants for each phase since it would not be consistent with other civs, maybe just use the Spartan buildings as place holders. Some of the units seem to have Boeotian or Pilos helmets which are probably too late. I think most units could have Illyrian helmets, with Corinthian helmets(and a few Chalcidians maybe) for the more elite ones. Maybe i should post the Archaic Greek design doc i have.

It aligns well with the ideas being referenced !

The last one is AI-generated and the plain landscape is done with a heightmap in Atlas? It looks promising!

I've got access, thanks! Looks nice too, I will add this one then

With some help @Thalatta   we might end up making a map that looks like this. Thanks again!