I think at the very least, AIs should attempt to unite the province they start in. It's kind of silly to see... The Helvetii or whatever they are called (Octuduron, north west of Medhlan/Milan, northern Italy) always build up to having a massive amount of people defending their little hovel of a town (3 20 stacks in my last campaign) and do absolutely nothing with it... Nothing until you attack them anyways.
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