AI attacks with 13 units on turn 58

Hi everyone,

Just signed up to the forums. I'm posting because the AI just attacked with 13 units on turn 58. Playing Emperor Standard Continents as France

This really seems ridiculous to me. I saw it coming a couple turns before at my first frontier city (city2) and had 1 archer come out and bought another. There really was no point, the city got steamrolled. Capital and one other city were not close enough to help.

Any tips on Emperor? I went with 4 city tradition open. Capital build order was scout->worker->settler->settler->settler->archer. Archer never made it out the door. The city I built JUST got the archer out the door during the attack. I think i bought 1 worker earlier as well.

Sold excess lux for cash, discovered about 8 CS. Got some cash from a couple ruins.

Techs researched were mainly just what I needed for lux.

I guess the only solution is to go maybe scout->warrior->warrior->settler->archer->settler or something? Maybe steal 1 worker from a CS? Doing this MIGHT get the archer in city2 out in time. But I probably wouldnt have enough cash to buy another because of lack of lux.

I dunno, I have to go back to the drawing board.