Very nice work! There's a CVAR for always showing the PRD with a target (even out of combat), but your method is way cleaner. Still there is some glitchiness with the cast bar though. It has happened on all kinds of casts, but only sporadically. Can't pinpoint it. I've recorded a vid so you can see what I mean:
https://www.useloom.com/share/a23202...fe2b4ccb4f7e6f. Thoughts are appreciated.