Get a strong character with new officers in Empire mode
Edit your characters and select the animation as Nobunaga Oda. Nobunaga has the most powerful skills that can be used. Then, select Free mode and train your new officers from Novice until Hard and upgrade your levels. Levels can be earned by defeating the officers or pawns at the enemy base. When you succeed in winning on Hard levels, you may fit the best points for your weapons. When you reach rank 20, you can easily win in Empire Mode by selecting the second selections with your new officers.