Auto-translated
It doesn't happen often, but it can be useful to place a strong stack (archers, skeletons, minotaurs, angels (against devils)) in the 4th slot during a battle with fast neutral creatures – only one stack will be able to attack it. And, of course, you need to make sure that no one wants to attack the 3rd and 5th stacks, so you have something to break the block and shield the archers.
