Just an observation: it appears the AI is not taking advantage of its faction's best units... Example: I have seen Almohad AI attempting conquest of Europe with practically no AUM's (I'm not speaking about the AI ignoring the fact that Granada produces AUM's with +1 valor). The result is rather predictable - the Spaniards are at the gates of Kairo within a couple decades in most SP games I see.

Similarly, I rarely see the AI Danish building vikings or the AI English building billmen and longbowmen (the latter, if I am not mistaken, formed up to 2/3 of the English medieval armies).

It seems like a simple tweak to adjust AI's behavior to fully exploit its faction's advantages (i.e., hard-code increased AI faction's appetite for its unique units). Maybe a suggestion for the Viking expansion?