in regards to condi duration
Conditions do a fixed amount of damage once per tick (every second). Let’s say one stack of bleeding ticks for 50 damage. If you apply one stack of bleed for 5 seconds, then it will do a total of 250 damage. If you have +20% condition duration, the bleed will last for 6 seconds, dealing 300 damage total.
So, yes, it will increase the damage in a way since it allows the condition to stay on your target longer and thus deal more damage.
However, keep in mind that since conditions only tick once per second, having a bleed stack that lasts 8½ seconds is the same as having one that lasts 8 seconds. This is most important for conditions that stack in intensity (bleeding, torment). Last time I checked, it was still unclear whether conditions that stack in duration (poison, burning) had their duration added up correctly (e.g. if two 7½ second burns would tick 14 or 15 times total).
Tarnished Coast
thanks for the reply! i wasn’t sure how it work but currently in my mind i was working something like 250 damage “stretched” out to 6 seconds. thanks for clear up. intensity was easier for me to understand but this one got me.