I'm not proposing a crazy buff, just giving him something like quick+surged so he can't easily get mobbed by regular zombies before he can get to a decent position. From what I've seen the most glorious jugg rounds happen when he has time to get into a good position (usually up high away from zeds) and by far the worst ones are on indoor maps where he gets a bad spawn and can't relocate to a more open area in time.
I get what you mean. But even without that change, wouldn't swapping his health pool and armor pool, along with giving him vaccination, eliminate the defense breaker issue with minimal change to the codebase? But then, zombies would probably just buy blood warden instead.
Maybe just make his HP (not armor) scale with the # of zombies?