Marmot, teach me this trick: Berserk + hit'n'run?:) Explain in more detail? I'm not very familiar with the terminology and techniques yet.
Only with hit'n'run was I able to break through the garrison with 8000 Azure Dragons on the map "Armageddon" and complete the walkthrough.
Specifically for the "Undead Apocalypse" map, with Berserk, step by step:
1. Take a suitable hero (an expert in fire magic is obviously the best).
2. Take the fastest creatures and artifacts for speed so that the first turn and the first cast of magic are guaranteed to be ours. Take the minimum number of creatures, because, unfortunately, they will be lost!
3. Attack, cast Berserk on the fastest enemy stacks that do not have immunity to it (Azure Dragons, fortunately, do not have it).
4. When the enemy under Berserk attacks his own and takes damage, on the next turn of our stack, run away.
5. Compare the losses and rejoice.
6. In the nearest tavern, immediately re-hire the same hero.
7. Repeat until the enemy is weakened enough that we can defeat him in battle.
(Василь Симоненко. Люди – прекрасні)