Walkthroughs for custom maps.

Besides denying the player resources and banning a couple of buildings, is there anything else interesting about this map?

There's complexity and thoughtfulness here. The map requires a very carefully developed strategy from the beginning to the end. The core of the hardcore experience lies in the strict minimalism of our capabilities. Essentially, all we have is a specialized version of the Tower. There's no magic (only blessings and occasional slowing spells are useful), and there's no adequate army, nor is one expected in the future. The worst part is that all enemy heroes, even the minor ones, are well-leveled, have logistics and pathfinding, and beat us with lightning strikes (I'm tired of trying to get 20% resistance against them). Killing them doesn't really help us much. The range of heroes available for hire is very limited for each faction, and after a week, the computer hires them again. Plus, we can't even reach some of the individual factions, meaning they will continue to be a nuisance throughout the game. At 160%, it's theoretically passable; I cleared the swamp garrison, but I didn't get the last secondary skill, so there's no point in continuing in this state. I've put this mess aside for better times.

Added 3 minutes later
If you play on a difficulty level below 160%, I think it will be relatively easy.