Guild Wars 2

Replenishing Despair – Incoming conditions provide a small amount of healing. Healing: 126

Does this trait factor in how many stacks of the damaging conditions are on you or does it just heal 126 per condition whether you have 10 stacks of each damaging condition or 1

It heals every time a condition is applied (not ticking), stacks don’t matter.

Rym.1469:

It heals every time a condition is applied (not ticking), stacks don’t matter.

what about skills that apply 5 stacks at once

It procs per unique condition. 1 bleeding or 100, doesn’t matter.

Rym.1469:

It procs per unique condition. 1 bleeding or 100, doesn’t matter.

ofcourse

To go one step further, this trait is rather weak.

Its healing is barely noticeable in the current (condi) meta where there is abundance of strong conditions (burning, torment, confusion).

Ilias.8647:

To go one step further, this trait is rather weak.

Its healing is barely noticeable in the current (condi) meta where there is abundance of strong conditions (burning, torment, confusion).

honestly, if they made this trait a master trait and redesigned it to account for the number of stacks in a meaningful way, more people might use Mallyx