not even cav in his current state is able to counter you which makes is it really boring if you play that. 2- NPC combat AI does not have them constantly moving forward when they attack you. In general when you play archers only you will be invincible and nothing can touch your army.

ai which acts like you are superior will turtle on a kinda good position but can be solo triggered with some long range bow shots to start the lemming run.

so you can solo disable all archers by circling close on a fast horse.

ai for foot archers / crossbowman get really confused when you circle them close, seems they need / can't get rid of advance and stuck in trying to get / distance again.

ai for infantry seems to not care if a unit has a shield or not and suicide in archers like lemmings, only advance in shield wall when they get so close that they are short for fleeing and will slow down none shielded units as well which makes it so easy to kill them with archers.

ai for cav will stand and idle to protect flanks and only attack when you hit the main infantry force or close in with horses yourself.

ai for horse archer will always charge you left flank due to you can't shoot bows both ways on a horse and run miles in front of their infantry and wanna circle you, why you can't shot bows both ways is a miracle for me.

i will copy paste here the behaviour from my roast about the game so here it is : I play on ai challenge mode since i found that option and i must say its a huge disappointment.

Mount and blade combat ai