Originally Posted by
moisesjns
Try the sub mods. For instance a Very basic one is to Increase AI general HP by 5, via trait editing, This makes the AI battle less Easy due to the poor AI charging their general. So it feels more like an actual battle than a quick rout. Also Do not use only elite troops. As Jurand says, Have certain "limits" For instance Eastern levys / regional, majority with maybe 3 elite guys tops.
It is easy to modify also, but you could increase the morale of all units, I never tried this, but it may make the fights more of a challenge than default, since they wont run so fast. Hard Campaign with Normal Battle AI, that has increased Morale may be something worth trying.