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I believe the most dangerous combinations are:
1. Lizards and Hydras. It's clear that the lizards stand next to several targets, the hydras attack these targets, and the lizards bite. (This combination is the most difficult to implement).
2. Lizards and Minotaurs. This is, of course, a classic. Any player understands this – the lizards stand next to the victim, and the minotaurs run up and attack twice.
3. Lizards and Furies. With such a high initiative, the furies manage to attack the neighbors of the lizards several times.
4. Hero + Twilight Witches + Hunters. This allows you to attack very powerful neutrals without taking losses.
5. Against morale reduction: New Minotaur upgrade (giving an aura of +1 to morale) + Assassins + Witches + Furies + Hydras standing nearby (this will be especially frustrating for a Necromancer who has upgraded their super ability).