We need an Ascension Bar
We need something sort of like an extra hotbar that is just for Ascensions. It could have all four Ascensions, and you'd use a spinner or options to select which one you're currently using.
Ideally it would be smart enough to know what's the highest level version of your potency buff, and just display that one.
Bonus would be if it noticed which Ascension you currently have active and automagically displayed that set of Ascensions.
Ascensions are eating my hotbars!