[QUESTION]

I'm afraid I can't help you with that – I don't use WoG. And you can't open a map in another editor. WoG introduces significant new features.
I've come across some interesting individual maps that, as it turned out later, were extracted from some campaign. I even translated a couple of campaigns. And it became clear why it was almost impossible to complete a map with a starting hero of level 1 – because the scenario was designed for a hero of around level 20, who had been leveled up in the previous maps.