This aura is just for reference.
It shows if a character in your zone is: TANK, MELEE, RANGED, HEALER
It uses 2 libs: LibStub and LibGroupInSpecT
I installed the libs in the WeakAura folder as well as via curse.
Basically you can find out who is with you inside the Raid and who is in what spec.
Maybe it will have a use someday (should have been for maiden myth, but we killed her faster).