Tactical retreat.

Tactical retreats were helpful when playing as Spaz Matikus. In the second map, the enemy had nearly 90 vampires, and my army wasn't large enough to kill them all. So, I divided my army into 4 small detachments and attacked the red player. While his units chased my small detachments around the field, I used disintegration to burn the vampires and then retreated. After three battles, he was left with only 20 vampires, and the rest of his units were also significantly weakened. Then, it was easy to finish him off. I used the same tactic in Silver Creek, but against paladins. I also took a small detachment, and while his troops attacked my small detachments, I managed to engage and defeat about ten paladins at a time. The main thing is to retreat in time, but it didn't always work, and I had to reload several times. Fortunately, the 5th-tier ranged unit didn't allow the enemy archers to attack the hero at the first opportunity. And also, if a player decides to retreat, they usually don't have much of an army left.