Question about the map "Longest Journey".

I finally found my save files: you weren't kidding, I landed on the shore next to the blue castle on turn 3-2-1, and he had already taken the rusty dragons with Khalid. Then he didn't attack but got into a boat, which I took advantage of. I was also playing on 160% difficulty: I try to stick to the difficulty recommended by the author in the map properties, otherwise the task may be either impossible or too easy.
Overall, this map isn't too difficult; it's just important to do everything in a relatively timely manner. After defeating the brown player with a lot of Towers, you quickly become stronger, then you need to defeat the pink player ("master of the seas"), who can cheat and fly across the sea and reefs to the west, despite the author's clear prohibition of flying. After that, there shouldn't be any particular difficulties.