Question about advanced hero classes.

Got it. Thanks for the reply! Field Marshal is cool, indeed. You can never have too much damage. I just decided to focus on a solo hero for this playthrough. Therefore, I'm saving money and not hiring units. So, besides the Paladin (considering the specifics of your map), I'm also looking at the Prophet (Permanent effect "Spiritual Armor". Increases defense in melee and ranged combat by 25%.) and the Dark Priest (The Dark Priest gains 1 health point for every 2 points of damage he deals in melee combat.). We'll see how it goes. Thanks again for the answer!