Duel map for Heroes of Might and Magic III.

You probably haven't studied this map well enough, that's why you're reasoning like that.
First, vampires with a Castle on the first week on this map is something out of a fantasy novel. And in the guild, the respected Kolbasser forbade the appearance of such spells as "Haste" and "Slow".

Did you read carefully? 11 vampires is a Stronghold plus 1 from the spawning point.
And for the "canned food" quest, you need other spells, although you can also get "Slow".

Well, that's understandable, but even if you manage to build 11 vampires (which is impossible on this map on the second week), the "canned food" quest might turn out to be a Tier 3 quest, and then either you lose, or you sacrifice a hero you don't want to lose, because you don't have much money either.

Besides the tournament on this map, I played once as the Necropolis. I had 11 Lords on the 2nd week and took
a regular "canned food" quest, Tier 2, on the 2nd week without any losses.
Plus, the "canned food" quest isn't attacked blindly; you can find out a lot by reading about the guard.
Often, it's clear whether it's worth attacking or not.

One morale and that's it, because there are no artifacts for defense or attack on this part of the map.

Only if you have a full stack, and even then, not always.

In fact, on this map, it's impossible to break through to any Castle on the 2nd week. I got carried away. I meant the 3rd week.

I, on the other hand, broke through on the 2nd week (in fact, I also broke through with the Swamp on the 5th day, and I could have done it on the 4th, but that's another story), but the situation was very favorable. And the main problem is the valuable resources needed to upgrade the vampires. And on the 3rd week, the Necropolis definitely takes any "canned food" quest and breaks through the archers without losses, so he needs to be banned.

I wouldn't dare to attack a Tier 3 "canned food" quest on the grass on this map, even on the third week - it's better to try to break through the archers. Morale is a bad thing, because this is online, and it can cost you the game.

With 20 vampires on the 3rd week, only PERMANENT morale can defeat the Necropolis