Manuals for playing as Dungeon

By the way, I had a good laugh yesterday: So, I was playing with a friend in local multiplayer (laptops). I was playing as Dungeon against his Haven. After we both sent our main heroes to attack each other, I had 5 upgraded Hydras left on the battlefield. And he had 89 archers, but without arrows. There was no point in fighting them in melee, so I kept casting Haste (thankfully, I had enough mana, ironically, he didn't), ran away from them, and eventually managed to regenerate my Hydras and kill him!