Rechecking Formula for Critical Damage

I tested again on an alt, with relatively no skills leveled, so their balance is 50% with rF Critical Hit. The data file is an excel file, and am unable to upload it here (I couldn't figure how to). Damage numbers being smaller it was easier to see that sometimes, foxes use defense skill without the skill icon and that causes reduced crit hits. I plotted the damage distribution as well from 136 damage points, so I can confirm there was enough damage rolls from lower end, due to low balance. The Crit Damage formula seems consistent even at minimum critical hits.

I am unsure if defense skill from foxes is only issue in my old test, I couldn't find what rank Brown foxes have for defense skill. But from the test on alt, it seems it is rF cause reduction seemed ~20?

Thanks for the help with solving my confusion!

So I think this discussion can be closed ^^