As I understand from what you said, this is a scenario where we attack a dungeon, and it's related to some kind of bug.
Added 1 minute ago
If there was a moat in the castle, we could put dragons on it and stop the berserkers. But it's unclear if there would be enough mana for the berserker to last until the azure creatures are completely destroyed, and I'm too lazy to calculate.
I hope this idea can be implemented, even if not in this battle. It would be a good puzzle battle!
Accordingly, the main idea works; we just need to get to it.
Great! Another working option. This is what brainstorming does!