Sacred Haven of Debauchery

It’s tough; I replayed the battle over a hundred times, and I restarted the map three times to fine-tune everything. Because it’s not just about “casting Berserk on a couple of Orcs”; there’s sophisticated protection against Darkness (Berserk works for one turn), and you run out of mana (the abilities for protection against Darkness and Berserk, as far as I remember, allowed me to cast it only once; on the next turn, I definitely needed the Necromancer’s Sign – otherwise, I’d be doomed. Although, maybe twice, but I don’t remember for sure). Plus, if you quickly eliminate all the archers, the rest will come from the town, and it will be very difficult to figure out how to kill everyone (and even a Cyclops wouldn’t destroy some creatures in one hit, but it depends on luck. I remember it either kills Shamans or leaves them with a hundred or so hit points). And if you don’t kill the archers quickly, they’ll shoot down even the Ghosts (and there’s also a hero and archers in the Castle Towers).
I had to install a mod to save during the battle; without it, it’s impossible.
You should try besieging that Castle yourself. The first time. Well, okay, at least the tenth time, since it seems so easy for you)