When I've been running the sims I've just been building 3 warriors then axes until size 4, with 1 worker dedicated to it it should take 12 turns to hit size 3 (start working the copper), and a further 8 to grow to size 4, making a total of 121 hammers over 20 turns. Working the wheat, then the wheat and grass forest. Build axes until size 4 when copper is hooked. Build a granary at size 4 quickly before we hook up a happy resource. The granary would be nice, but it isn't critical as we have no reason to slave that city, and we can build one before we restart growth. The 4 warriors would give us a few cheap fogbusters and explorers, and would mean we don't have to build a warrior at the capital, instead we could build a work boat to explore with.