If you're like me and prefer to have a weakaura over another raid frame, this weakaura will keep track of your renewing mist and enveloping mist remaining duration on your target. Can be sun king or whatever target you have selected.
If you'd like to just have it for every encounter you face, just go to Load > and click on Encounter ID > then you have it.
Made this really simple weakaura because was looking for one but didn't find anything I liked.
So yeah :)