The 8th stage of the annual John Van Caneghem Tournament (2007).

Fire, you're a genius. My applause!!!
I've already printed it out, I'm going to study it.

:) Yeah, and the main thing is that after reading the walkthrough, everything becomes clear, and you think, "How could I not have figured it out myself?" But in reality, it's a time-consuming option. Here, you need to scout the heroes and explore to see who diplomacy will work with, and there are long battles against slow units (thankfully, the ballista killer works), and chains for transferring troops. It all exists.
And I think this map would be perfect for the Best Of Best tournament! But, apparently, the organizers have even better maps.