[Archonsod]

The thing is, from a historical perspective men in plate wore padding underneath the armour precisely to mitigate the effects of blunt weapons.
Looking at it from a historical perspective doesn't make much sense though. Knights in the real world never faced the problem of people chucking lightning bolts at them (and if they did, metallic armour would probably be right out). That's before we consider that lava-blooded humanoids weren't prevalent throughout the medieval era either.

Personally, I'd rather see something that kept recruitable troops competetive into the late game.