Walkthroughs for custom maps.

Completed the map in 139 days.

And I did it in 140! :) Of course, if you really want to, you can do it much faster, but here I wasn't chasing points; I was enjoying the adventure.
alextet, this is really unclear, but I had another Orange hero who somehow managed to fly to cell 80,29 and stood there until he disappeared because I captured all his castles. Seeing him with Air View, I even (after saving) used a Portal to jump there to kill him and see what artifacts I would get. He didn't seem to have any at all, which means he had no legitimate right to fly! (Then I loaded the save and continued the Walkthrough honestly.)
Maybe someone can dig into the save file and figure out these wonders. I'm posting the save in the appropriate "AI Cheating on Single-Player Maps" thread.
The map discussion on the maps4heroes website mentions such cases, and the reason for this remains unclear.
I don't know of any maps that are exactly the same, but you can try another map created by Jimmy: DreamLand.