To make life fairer, there will be a tent beside the arena. In that tent is a cleric, employed by the King. He gives each entrant one single healing potion to the value of 100 GP.
[In RPG terms, I will credit each entrant with 100 GP via the admin panel. Use it to buy a healing potion.]
You know, I was thinking that I'd provide a 500 gp bonus to the player that actually used the comments section for their attacks (and if multiple, then the best one), but since the game doesn't save battle data, that's not possible unless I actively watch every fight which isn't a possibility.