I think there should be a No Damage% Category as a misc category The Premises Is Stated Below

This Category is Beating the game without taking damage this could be added for Any Difficulty and Ultimate This can also be for 100% Aswell (Most Likely not that would be very annoying)

If you want a category made then you need to do a run of the category so we have a video to go off of before we decide if we want to add it to the leaderboard.

Personally a challenge style run like that doesn't need to be on the leaderboard as in general taking damage makes you lose time as you have a stun/stagger animation causing a couple of seconds of timeloss anyway so trying to go damageless is normal in a speedrun.