After some time with other ageod titles, I returned their most succesfull game for some casual game vs AI. For starters, I started 62 Campaign where Players start with formed command structure. I restrained from using regional decisions since ai doesn't use them properly either.
The.tactical game went reasonably well, but then I noticed
AI doesn't use money volunteer and draft options well. I guess there is a trigger in the code if I have low CC, I'll call for volunteers. But here lies the catch, if I want a lot of volunteers, I meed to pay for them, which means I have to collect much more money than programmed min treeshold for choosing that options.
The solution, don't try to make ai too smart, make it choose financial options as soon as it resceives them. It may not be optimal play, but it would be good enough, and the ai would ppay economic game much better.