Duel map for Heroes of Might and Magic III.

Did you read carefully? 11 vampires is a Stronghold and +1 from the spawning point.

Sorry, I miscalculated.

And for the "canned food" strategy, you need different spells, although you can also get slow.

This was not about the "canned food" strategy, but about

And the hero might also have speed, so the lords will reach their destination.

Besides the tournament on this map, I played once, and it was with the Necropolis. I had 11 lords by week 2 and took a regular "canned food" stack on week 2 without any losses.

As far as I know, you played this map offline. Taking the "canned food" stack online and offline are completely different things.

Plus, the "canned food" stack is not attacked blindly; you can learn a lot by reading about the defense. Often, it's clear whether it's worth attacking or not.

You can't distinguish a level 2 stack from a level 3 "canned food" stack if there is no upgraded stack.

Only if it's a full stack, and even then, not always.

And if there is morale, you can't win, because this is not an official game. :)

(I also managed to break through with the Swamp faction on day 5, but it could have been on day 4, but that's another story)

We are playing without diplomacy.

With 20 vampires on week 3, only PERMANENT morale can destroy the Necropolis.

I agree with that, but it's better not to attack a level 3 stack with 20 vampires, unless you have a shield with advanced earth magic. You can try on week 4, but you will be completely at the mercy of fate. :)
We got sidetracked. Everything is clear with the Necropolis, but what about other castles, for example, the Castle? I was lucky that a secondary hero was given tactics, which I upgraded to advanced and took with the loss of only a few griffins. But what if not? :) If I knew which map I would be playing, I would have taken Turis, but now it's unclear. I want to remind you that this is an online tournament, and you need to take into account morale, etc.