Questions about the gameplay of Heroes 6.

The question is complex, but important. When I played through the campaigns, I chose different paths for the heroes; for some, the path was fitting, and for others, it wasn't. I chose them out of curiosity. Now, I've completed all the campaigns, and in the Dynasty mode, the heroes have their original classes and paths (mage/warrior, evil/good). Is there a way to change this for duels, like replaying the campaign or editing the files? I'm interested in the opinion of those who definitely know. Quickly replaying the campaign with Arachan didn't help. Also, the hero Anton doesn't appear for duels because when I played through the Griffins campaign, they weren't working, so I created a different hero.