[@Rai], That's the problem I was running into as I was thinking about it.  Though, it would be an interesting concept for a recovery based monster.  It would simply need to have a symbiotic relationship with another monster that had more of an aggressive or defensive combat role.  It could even be colonial, much like ants.  In any case, I'll leave it at that for now.  We'll see if I can come up with a less exhaustion addled concept later.