How thorns (dual blader) works

I wonder how Thorns will stack with the Critical Rings, any ideas on that?

Corsairs will love this skill too. I should make a Dual Blader just for a Thorns mule.


EDIT: Reading the translated comments, it seems Thorns will stack with Evan's Crit, making it (30% + 35%) success and (150% + 125%) damage. I can't tell if the poster was stating that as a fact or simply asking a question though.

It also seems that the Adventurer Rings do stack with Thorns too, making it (35% + ring success). Again, that's from the translated comments so I can't tell whether it's accurate or not.