Ok I just tried this mod on the crusades campaign and I must say I am very impressed. It is actually possible to lose battles now even if the AI troops is only slightly more powerful, the cavalry always attempt to flank and those mamluks are deadly now! Will do more testing, but I'm very impressed so far.
Some question though, is it possible to apply the battle AI in vanilla MTW? Do I need to copy certain files or something? Also, is there any campaign ai/diplomacy mod that is recommended to go with the vanilla TW?