Yes, Euratlas maps are trully great. There are one of my sources for the map I made earlier :)

Vikings factions should not waste a lot of time conquering Scandinavia. I think the north of Scandinavia and Finland should not have a lot of Provinces, and be heavily protected by rebel armies, just as eastern russia (so the Varagians and the Khazars don't spend their time conquering empty lands once they've torn apart the Volga Bulghars and the few other organized tribes living here)