Alright, first. The arena they are in is asking for Gnome to abuse the shit out of it. She can crumble it below beheaded and re-make it below Han even if he gets dropped off or something. And with her hundreds of meters worth of control, she can just move the ones close away. Admittedly, the terrain also nullifies Han's tactic of going underground and hiding like a mole.
Mana potions and Health potions, plus his natural regen, can keep him going, but here he can't go for a battle of attrition.
Bambu seems to still not understand that Han amps his own body to 5 tons, not in the first comment at least...
Gold transmutation is useless here. Berith also mentions how he couldn't have done it to a metal if it had mana infused in it, but Han doesn't use any period, so who cares.
Draining life force from a corpse tough is a flat out yes. It works on zombies. Why? Because. Tough, with what Beheaded is, Zombie Slayer stat amping Han's attacks by 30% is going to be nice.
Reflecting the arrows should simply have them home back in. Even if not, Han's own mana isn't hurting him.
Still, to say what happens here...
The points about the arena are all pointless. Both are teleported into a pocket-dimension of a Korean City, and the fight happens there.
After seeing Danamku, Han attempts to hide underground and has Gnome make a hundred deep hole for beheaded, and wait for the right moment to spring it. After that, (and after reinforcing it with Gnome, as well as having her remarke it's damaged parts. Not that trying to destroy walls 100 meters underground is the smart thing to do) he chucks down mana bombs till he dies, and if he can reflect a spinning ball twice his size... it hits another mana ball and explodes regardless.
What happens from there, I would need to know from Bambu.