Inter-clan (ONLINE) tournament for Heroes 3.

By the way, here's a small statistic that shows that an XL map is smaller than an L map with a dungeon, which is the size of two S maps or one S map with a dungeon...

I just expressed myself incorrectly, or rather, I didn't say everything I was thinking. I compared all sizes with a dungeon (except XL). I'm not reasoning based on numbers (although not without them), but based on the experience of playing (not just mine) on L+U on random maps. Playing in pairs on L+U with 160% usually lasts from 3 to 6 weeks of game time (rarely longer). I think that's not much. If 4 people play, I don't think the game time will increase much. Although this will affect development, because now the resources will be conditionally divided by 4. You can just test it: generate an M map for four players and try playing with the computer. And you'll understand how cramped it will be. I guarantee that encounters will happen as early as the first week. IMHO, this is not interesting.
And 1.5-4 months is an exaggeration. At most 2, and even then, the second month will most likely already be with two of the survivors.

and if you prohibit the enhancer (and, accordingly, the vampire upgrade)

By suggesting to prohibit the necromancy enhancer, I mean playing on a random map where there is a lot of small, diverse guard, that is, future skeletons. Yes, it's sad without the vampires, but it's really possible to play against the Necromancer.

what will be left of the Necropolis?

Just some miserable 1000+ skeletons, which, under the leadership of Galtran, sweep away everything in their path and without vampires. I suggested this option so as not to remove the necromancy skill and allow them to use it.
Yes, everything I wrote above implies playing on a random map (let's say on a manually edited map).

and in general, there will be two of you! and I'm sure that together you can easily handle the Necropolis, as well as any other castle!

well, the Necromancer won't be alone either. ;) He can also have an ally pass a couple of hundred low-level units for processing into skeletons. By the way, can you transfer troops to each other as allies?
I suggest testing a cooperative game with four players on different map sizes before the tournament, in order to finally come to some conclusion and draw conclusions based on practice, and not theory. And let's not just argue :).

you can kill 10,000 skeletons, the main thing is skill and the desire to win!

You can, I agree, but if you let the Necromancer develop to 10,000 skeletons, it will already be very difficult.
You can't always get objectivity with a calculator. If you're going to calculate, then the area of the dungeon is much smaller than the area of the surface. And the underground is sometimes used as a passage to another respawn point. Of course, I will be against playing on a map like "Me and my shadow" with all my might, where we will play until 2009 with four players. And even if the map is large, it is unlikely that each player will explore every corner of the map. The main thing is the distance between the castles and the guards between them.