You can set your builders on hotkey, thats what I do to my 4 civilians at the start.

Builders and "Field Builders" are made separate. Builders that just have finished a House should not go over to build a Field but become idle Up to 5 Builders who are currently buildings a Field become Farmers instead of searching for other buildings to finish Really annoying when your House builders "go missing" because they decide to become Farmers, and if you build two Fields with 10 Civilians they first build both Fields, then start farming.

Even against Hard Aggressive AI they only attack after 12 minutes. Not sure if they attacked sooner because of Aggressive or Hard. Vs_Aggressive_Hard_AI.zip

Set the behavior to "Aggressive", it should attack more often and sooner. Yeah, I was also surprised to see that many units. Crossbowmen destroyed me. EDIT: Here is one for the revenge. What changed, is I increased the average batch size of units, to keep resources low. PersiaVSRome.zip

So far the AI feels rather toothless to me. I have not seen them attack before the 12-14 minute mark, and they usually only attack with like 40 units max. Never seen them attack with 80 units like in the replay above. That's a good value for that state of the game. Would love if the AI also sometimes attacks after 2-4 minutes and 6-8 minutes to keep you on your toes.