It would be nice to have smaller bars that can track the cooldown of holy words, including the talent Miracle Worker. Having something similar to combo points where each point is a Holy Word would be great, bonus points if there is an indicator like a colour change if the current cast will take one off cooldown.

For example, there would be 3 "combo points" by default, one for each holy word. Then with Miracle Worker talented, it would expand out to 5. 2 each for Serenity/Sanc, and one for Chastise.

Almost done, here's a snapshot of where it is at the moment.