Ah, yes, mount and blade. Where not becoming a solo warrior of death horse archer is harder than not becoming a stealth archer in skyrim. If it helps, I liked to have big armies of the super ground archers and put two groups of shield infantry on the left and right of them. It seemed to work okay against horse archers.
Holy crap, 3500 games‽ I thought I was bad with 1/10 of that and mostly low play hours. I wish I had your organization, because my factorio layout is so bad that I just gave up on trying to be small and well designed. Everything must have miles-long conveyors!