Discussion about Dungeon (Dark Elves).

Okay, okay, let’s put that question aside. I recently played with Lethos and boosted his Darkness skill, but I’m not sure which creature type to focus on. Should I go for Minotaurs (2 extra attacks, which will restore more HP), Raiders (more damage due to ignoring defense), Hydras (attacks multiple targets and probably regenerate more HP), or even Red Dragons (their ability is amazing)? So, tell me, how do you guys do it when boosting Darkness and Vampirism on a Town Portal?