Super Unit in Heroes 5.

The topic itself is useless.
Why would you need a super-unit? To guard artifacts and treasures? Just put 500 Dark Knights, and you won't need a lord-vampire.

I agree, it would even be more effective, and a super-unit would disrupt the balance.

Added 7 minutes later
although if you have nowhere to put your imagination, you can dream a little =) but not too much, for example, remember the silver Pegasus from the 3rd game, and give it something like this:
Attack - 50
Defense - 25
Damage 80-110
Health 600
Initiative 18
Speed 12
Abilities: Magic resistance 100%, Sky Strike (like the griffin), Hatred of the Undead (Inferno and Necropolis - double damage)
Growth: 2
:)<