What are the most dangerous unit combinations in Dungeon?

In what situations? Why? In combination with which heroes? Against whom should it be used? Where is the justification? For now, there are only a couple of meaningless phrases here.
If the author does not correct their first post by replacing it with an expanded discussion that answers the question in the topic title, then the topic will be deleted. Examples must be from gameplay against another player; killing AI on easy difficulty is not welcome here.

P.S.

P.S.: Please also share tactics for conducting war (the game) here...

Then what is the purpose of this topic Guide to playing as the League of Shadows?
It's not worth creating duplicates and topics whose titles have meaning, but the content of the topic itself is lacking.