Question about the map "Longest Journey".

Here, you need to kill Kalida and all the blue heroes because you need to move on, and everything here should be ours. Of course, you can't defeat Kalida head-on. I remember blocking one blue hero on the sea (either during my first or second playthrough, I don't remember). The main thing here is to act quickly enough to prevent the enemy from getting the Rust Dragons (this quest assumes that we can take them ourselves if we want), otherwise the enemy becomes too strong. The same applies to the brown faction: on their territory, there is a hut with a quest that gives you 46 Crystal Dragons. If they manage to get them, it will be very difficult for you.
By the way, there is an easier version of this map called "Longest Journey TE". The differences from the original that I know of are 2: a burial pyre in the starting area at cell 30,3 and the Sword of Justice at cell 11,71 (both are in a Dungeon).