Small tip for hero farming.
Keep ONLY a level 1 Inn. (New City?)
Buy the loser heroes and then dismiss them.
This will cause the Inn to restock its hero.
Continue until happy.
Negative. Gold use! That's one reason why the Inn is level 1 though.
Positives. No need for Cents on Holy Waters or Refreshes! Reason for that is level 1 Inns produce low level heroes. It makes it easy to see their POTENTIAL and not need to gamble with Holy Waters.
I ended up with 69 Politics, 70 Int Hero. I'm happy. :)

