Captain
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Sash, read the manual; in the past two years, people have probably already considered the things you're asking about. It's synchronized down to the contents of the dungeons; you can start with identical heroes (or different ones), and in the latest versions, they will even have the same skill tree.
I couldn't find it on the website, even in the Templates section.
In my opinion, if you know about this, it's easier to implement. I already like the idea of mirrored maps.
Дипломатия - искусство говорить собаке "хорошая собачка" до тех пор пока не найдешь подходящую палку.