Current questions and answers regarding the map editor.

Hmm... I've implemented a knight as a hero. Can you suggest an attack animation for him that looks good and doesn't have shields/swords hovering over the attacked unit?

I don't think there are any such animations. Perhaps the Vampire-Nicholas attack animation, but that's unlikely.
It's better to create heroes from ranged/casting creatures. You won't have to worry about attack animations with them.