are you still working this AI? I want to report that in HURB rebel AI is just stacking armies but not attacking factions, they do defend their land though... but also that the rebel is now quite too strong for the smaller factions like venice, georgia, norway, serbia... they are rather unable to expand and risked getting crushed by bigger factions... I'm not really seeing AI allies helping like you advertised...
btw, does campaign db file which you stated control autoresolve calculation affects AI vs AI battles?