I made this for Shadow Priest auras that look almost exactly the same as the old RealUI AuraTracking. Differences are documented in the description, and you can see it in action in the attached screenshot.
https://wago.io/4keSU_zKG
Hopefully it's helpful to someone who like me was very attached to this part of RealUI
Edit: Updated for all priest specs, and fixed a display bug where the frame strata of the stacks was sometimes below the icons