Walkthroughs for custom maps.

Well, generally speaking, I think HotA is the most optimal platform for offline tournaments. At the very least, the fact that the Admiral's Hat has been fixed is a major plus, and, for example, the infinite shots of the ballista have been removed, along with a bunch of other bugs. In my opinion, the fewer additional rules there are, the better. Engaging in nitpicking is, of course, a good pastime, but it's better to remove the very possibility of using exploits.
But all of this is not important because there aren't enough people. Being the winner out of 4 people is not a strong motivation, especially considering the strict time constraints and the need to sacrifice something for the tournament. Completing maps is not tied to time; you can take half a year to complete them without rushing.