All of which is largely pointless as the game will cut your kill XP the moment you start to out-level monsters.
The XP debt is meaningless - it's pretty clear the game was balanced to a non-wisom/non-mindreading character.
It made some sense when damage was level scaled as 2 extra player levels made a huge difference in combat but in DKS I can't see any point.
Especially in the expansion where most of my skill points came from books generously given away with completion of every quest.
And I can't see why would you care about armor, the biggest problem I had was doing too little damage.
Solutions that cost you XP and rewards that can have little to no use.
That doesn't sound like reasonable trade.