Since I had plenty of money and resources, I didn't have much difficulty. The strife between the lords has exhausted me.
At the beginning of the game, I made friends with other cities and invited those who were not part of the alliance.
The training of the soldiers recruited into the army is very important! Do not accept the 12th city into the alliance unless their fighting skills are between 15-20.
Make sure there are 10 archers with 15-20 skills in the army because the inquisition army will be very strong.
In the last battle, divide the army into 3 and surround so that the 3rd army can hunt the archers from behind. Inquisition archers killed two of my lords.