What are the most dangerous unit combinations in Dungeon?

I think the strongest combination is Minotaurs and Hydras with Haste and Smite... if these two units catch up to the enemy, it's going to be very bad for them, as they have the highest hit points and deal significant damage. And alongside them, the remaining survivors – mostly Dragons and maybe Twilight Witches... it's just great to watch the enemy fight against Hydras or Dragons!