Laughing Banana
Weeping Pickle
Using your supply of numbing mist isn't a very good strategy since he will only heal once. It's better to just carefully whittle him down and let him heal and use up his vial.
Uhhhh... from where did the myth of him only heals once come from? Definitely not in my file where he healed up 2-3 times. I distinctly remember this because I yelled MOTHERFUCKER every time he did it lol.