Skills in the game

Here's a question: if you were to choose a main hero for the Stronghold faction, would you pick Kreg or Gundula?

As for the Stronghold, I don't play with it much, so I can't say. When choosing a hero for the Castle, I considered these two and chose Gundula, and I didn't regret it. Honestly, I don't quite understand how to fight without defense; is it about not taking any damage? :) I'd rather have any swamp creature or warrior than a Barbarian. And as for mages, Gundula and Dessa are super heroes; I'd take them into my party without hesitation.