This aura shows you:
• the health (and absorbs) of your assigned Gluttonous Miasma soak target;
• the stacks and duration of Essence Sap for everyone that is assigned to soak the same target, with currently soaking players colored pink;
• health threshold to survive the next Desolate for your soak target (pre-mitigation).
Automatically configured through ExRT note. Example ExRT note (class colors optional):
Miasma {circle} |cffc31d39Naemesis|r |cffa22fc8Tuna|r |cfff38bb9Cavollir|r |cff00fe97Tonikor|r |cffc59a6cWorst|r
Miasma {triangle} |cff00fe97Brewdamar|r |cfffef367Durgon|r |cfffef367Ryler|r |cfffe7b09Skabird|r |cff8687edSoulution|r
Miasma {square} |cff8687edSaffyra|r |cff3ec6eaWots|r |cff3ec6eaParis|r |cffa9d271Dironya|r |cfffefefeTjztar|r
Miasma {cross} |cff8687edGohi|r |cff3ec6eaTurby|r |cffa9d271Hercraft|r |cff00fe97Cadarian|r |cfff38bb9Naharis|r|r
Make sure the marks in the ExRT note match the marks that your boss mod assigns!
Or just grab this: https://wago.io/PescorusMiasmaMarks