Beach of Scathach Golems

I do 74~170 with my knuckles and the highest damage value I saw was 18 when I used final hit. 170 = 18 damage, so it has roughly 89% protection and 0 defense. Or 70~80 protection and whatever remaining is defense. So 70% prot means 51/170 damage minus defense, so 33 defense?

So to do 18 damage with my 170 total, it needs to have a 33/70 def/prot ratio. Or if it's prot is 80% it would be 16/80 def/prot ratio.