This mod is based on https://wago.io/QzMqk14rP
I reversed the Debuff logic and removed the aggro settings (As I recolor my nameplates based on aggro). Which means that you can reduce the opacity of nameplates that have a specific debuff already on them (like your dots).
All other settings are the same. You can change the opacity depending on:
Target / non Target / Focus
Casting / non interruptable
Combat / non combat
Debuffed or not (you can customize the debuff by Spell ID)