Well, I managed to lose all 4 battles on the first try, and then win them all on a second try. I am very happy with the balance I managed to achieve in my mod.

I am not really surprised though. In my mod, DFK have total def of 32, and I had spear militia to counter that. I managed to win the encores by pretty much rushing a single flank as fast and as hard as I could, then rolling up the other. However, there was no way my classically-deployed combined arms lines could hold against a charge by an army the half of which is cavalry and the other half is elite infantry. With the higher morale, I simply ran out of men in the battles I lost when my lines were spread wider, even though half of the AI army was routing too.

This is also why I disagree with people who advocate upping the costs of cavalry to balance the game: this does not prevent a player from using it, but it does prevent the AI from buying overpriced units, which makes the game easier in fact, not harder.

In any case, I can conclude from these two batches of tests that:
- the AI has problems handling missile units, both using them and defending against them (especially when it has its own missiles too)
- the massed cavalry rules the day even with a simple frontal charge
- the AI's biggest problem is bad campaign map recruitment
- combined arms is still more fun than spamming the elites, and I'd prefer that the AI can do well with combined arms than to spam a single kind of unit