Lengthen Deep Wound Mod vs. Quick Recovery From Deep Wound Mod

say i have an axe with a Lengthen Deep Wound Mod on my axe

i use this axe to hit a monk

the monk has a Quick Recovery From Deep Wound Mod on his staff

how do these two mods interact?

does my mod make it so that he must under the "normal", unmodded Deep Wound duration?

does my mod overpower his and deepwound him for 21 seconds?

does his mod overpower mine and make my mod totally useless vs. him?

what's the deal?

His mod will make your mod pointless and useless. The monk will have a deep wound for the normal duration though.

i am confused by that answer

so are you saying that my mod is causing his "quick recovery" to be "less quick"?

no, he's saying that they cancel each other out.

Lengthen increases the time by X amount.
Quick Recovery decreases the time by X amount.
If it lasts for 3 seconds, then 3 + X - X = 3

That is, of course, if the mods do not use percentages.