[0.90][3B][Gameplay] feeling compelled to fight all tactical battles
By default, the tactical battle is set for 4 units. Sadly, at the beginning of the game, if your sovereign has at least a combat speed of 2, you must fight all battles, especially against spiders which have 25 HP but only a combat speed of 1.
You let them come near you. During your turn, you spend 1 action to attack and 1 to move back. That way, you can hurt the spider each turn, without being hit by the spider. So you end the game without any scars. If you choose the auto-resolve, you will end with 5 or 7 HP less than when you decided to fight.
If I remember correctly, one aim for the AI in tactical battle was ensure that human players aren't compelled to fight all tactical battles. If the AI, when doing the autoresolve, can't use a valid hit and run tactic, allowed by the combat rules (you can't do that in HoMM or KB since attacking will use all action points of your unit), then the tactical battle will be seen as a burden.