Like as a buff icon, or an effect on the ability slot, or just something that shows the duration of an active ability. Because trying to keep count of it sucks and it’s much better to simply see how long something is going to be active, without relying on VFX that need to be on-screen and unobscured.
As an example, Diablo 4 has a small bar above ability icons that empties over the course of the ability’s duration. So, even with a hundred spell effects and a bunch of things to keep track of happening as I’m dodging and running around, I can always see at a glance when something is about to time out, and refresh it.
Obviously this isn’t mandatory for gameplay but it would feel a lot better imo