I found this today. It's a collection of weakauras for different classes, roles, and bosses. I'm going to try out some of the comprehensive ones and give a suggestion later on which to try.
Remember, Weakauras is an addon I strongly suggested to install. Please give these a try if there are situations where you are struggling. Other people are creating WAs to help solve the same struggles you are having.
I reworked a bunch of timers and notifications for my rogue the other night to help me keep track of my rotation timers. And since it's a dot spec for the most part. It's one the best Addons I seen. You can also have it play sounds if a dot fall off or a cool down comes up to reapply it. I was testing out it in LFR Nighthold last night.
If you've raided with us you've seem some of our raiders have phrases like "I APPEAR TO BE ON FIRE?" or "Laser incoming!" or "I'm standing in crap!" pop up over their heads.
Those are from this set of WeakAuras: https://wago.io/VJJIupZVf
The /s phrases are SUPER helpful in particular and I just in general like them a bit better than the other ones linked higher up.