a few questions about damage reduction mods

are these calculated multiplicatively like damage done? is there a max cap?

There is no maximum cap but it is multiplicatively-stacked as decimal values.

So stacking 50% and 33% = [damage] .5 .66... = .33...

This makes it exponentially more difficult to reduce damage to 0, though it's easy to still maintain large amounts of DR that can be out-sustained on a number of builds.

That said, negative condition duration effects are additive, so doing something like reaper's Relentless Pursuit in shroud (-66%) + Hoelbrak Runes (-20%) + Lemongrass Poultry Soup (-20%) makes the reaper be immune to chill, cripple, and immobilize with 40% condition duration reduction for everything else.

yes it works multiplicatively, and i have no idea as to why the guy above is explaining negative modifiers.

alright thanks guys.

Just remember its multiplicative on the previous damage value at each step. So 10% + 10% = +21% total damage; or (1000) 0.1) 0.1))) = 1210 dmg

This compounding effect translates to insanely high damage values when applied for output, but only "seems" less effective when applied to incoming damage as the numbers have the inverse version of this property.

edited OP. sry for the confusion guys.