What are the most dangerous unit combinations in Dungeon?

Hydras with teleport, dragons on the front lines, and harpies running back and forth, while the hero Sinithar casts spells and that's it.

No, I understand that they might all be connected in some fantastic way, perhaps they even communicate with each other on a subconscious level, I don't deny that, but here we are describing combinations directly in battle. How to get additional benefits in battle by correctly using (for example) 2 units and the possible mutual influence they have on each other. The combination of a lizardman and minotaurs is the most obvious example. The combination of archangels and paladins is also one of the first that comes to mind, although it doesn't apply to Dungeon. And what you listed is not a combination, but just a normal way of fighting. And a warlock with teleport is an exceptional case. Although, in principle, there is some meaning to it. A lightning-fast attack. But IMHO, it's not for warlocks; they're better off dragging things out and casting more spells.