NHF – new heroes for Heroes V 3.1.

These abilities trigger for all units depending on the ratio of the attacker's and defender's parameters.

Not for all. There's also incorporeality. And also the bear scare, which hardly depends on parameters (against small targets). Even one bear has at least a 50% chance of scaring away any number of units (of small size). And also the unicorn's resistance aura. A key stack being affected in this way is no less noticeable than being halved. There are plenty of examples of units with and without upgrades that are effective.

Not 8, but 7+Tactics+boots+Aura (rarely). Plus - RD + BDP (Necropolis). There are plenty of chances.

But this is no longer a weak hero.

We're talking more about a cunning hero.

Or a cunning hero that is practically realized in this way, or just a theory? Is there any statistics that such a cunning hero is overpowered?