Ai should have better defense of capitals, border consolidation, invasions with more army groups, retaking of lost regions

Ai focus on recruitment of armies so faction will be more of a threat at the mid game. Upkeep raised. Building costs raised.

Ai aggression raised, Ai will invade more and defend their regions better, allies help protect better, battles are longer and more difficult; armor stats raised, weapon stats lowered, economy is more difficult; recruitment, upkeep and building costs raised, better naval invasions, more armies, campaigns will be more difficult-so pray.