I understand what you want , I have a weakauras that does exactly that , the only problem is that is Icon type. https://pastebin.com/Wq3hTkNy
You can create your own WA bar style and help yourself with the settings from my WA or try to convert my wa to bar style , although I dont recommend it, cuz converting seems kinda buggy, so the first option is the safest.
Basically to make it , you need 2 wa for each rune , one appears only when the rune is rdy and another one when the rdy is on cd with its progresses.
You can make only 1 wa by doing all of this if u are using custom code.