NHF – new heroes for Heroes V 3.1.

That's exactly why the NOIADE calculator was created.

Sincerely, Psatkha

This is only a partial solution to the problem... Yes, with the help of the calculator, we know the approximate strength of the creatures, but it's still too high. ;)
If we weaken them, reduce the number of abilities to a reasonable amount, and so on (of course, with the help of a calculator, this one or the one from Nargoth, I don't think it matters), then it would be a different story.