After the extended maintenance today, if you have time, consider getting your heart of azeroth upgraded so you can access your major essence.
https://www.icy-veins.com/wow/essence-g ... of-azeroth
https://www.wowhead.com/news=292651/fin ... of-azshara
These essences provide a big buff that should help getting those last few bosses down.
Essences
Re: Essences
Looks like my two best ones are tied to the new reps lol. So, will be easy, but gated