Hi,
I read the guides but just trying to clarify
Do you spam essence down with Disintegrate, or just avoid overcapping? Is the priority to avoid the overcap?
So far ive got
FB, ES, LF
Pyre instead of LF for AOE 3+ or 20stacks at 2
I dont use Shattering Star (should I?)
Burst uses decreases firebreath cd
Essence ability decrease eternity surge cd. Either pyre or disintegrate are fine depending on the situation.
Make sure you always proc burst with instant flame or azure. You should be able to cast another FB and ES before dragonrage ends
Generally: firebreath > shattering star > eternity surge > burn out proc > disintegrate
During dragon rage any empowered ability off cooldown is highest priority.
Pyre stacks depends on whether you have volatility. With it, you cast at 20 outside of rage and 16 raging on. Over two I think it depends on how much benefit you get from Giantkiller where the lower their hp the more stacks you wait for, but I’m not 
on that.
I have a question, should i always cast lv 1 FB even on burst?
You usually want to use level 1 FB on single target (or even 2-3 targets where you will still use disintegrate) because having the dot rolling 100% of the time is a big dps increase via the Catalyze talent. As long as they will live long enough. Anything that will die soon should be hit with a higher rank FB to get the damage in before they die.
On aoe, such as m+ packs, you will usually want to do max rank FB. This lets you do more damage through your mastery - frontloading the damage means more of the damage happens at higher hp percentages. It also procs the maximum value from leaping flames which is a pretty significant gain as well. But if you have to send it early to dodge a spell, or if you know there will be a priority target that you will be disintegrating, it is fine to hit it with a lower rank FB.
On a council fight it depends on other talents. With Everburning flame and Firestorm you want to cast it at the highest rank you can get away with while ensuring it doesn’t drop off. On a Feed The Flames/Pyre spam build it really doesn’t matter all that much whether you go with rank 1 or max rank. Leaping flames is nice, but mastery gain is minimal over a 20s period against raid boss levels of hp. And on pure aoe like that you may wish to go for rank 1 casts to push for a 50 second dragonrage extension.
Generally: firebreath > shattering star > eternity surge > disintegrate > Living Flame Filler (proc or no proc)
I’m pretty sure that would be the correct priority.
I don’t play a lot of devastation, but wouldn’t you want to prioritize the burn out proc over disintegrate as long as you weren’t going to over cap on essence burst? Living flame procs that.
Disintegrate will do more damage.
You can spend all of your burnout procs while also not overcapping on essence, which is what happens if you spend burnout as a higher priority than disintegrate
Maybe in a rare situation you’d proc burnout on 3 back to back flame breath ticks, but that’s definitely rare, and either way it does way less damage than disintegrate does, especially once you factor in Scintillation and Catalyze.
The first burnout proc after fire breath should be used when you have no essence burst stacks, since fire breath will give you at least one stack of leaping flames, causing at least 2 living flames to be thrown out, maxing you at 2 essence burst.
Better to prevent essence cap first since burnout+leaping flames will likely cause an essence burst.
we were talking about dragonrage, so its not likely, its guaranteed.
I think the standard M+ build doesn’t use shattering star. I kind of miss using it, though. lol
You get so used to pressing it that it kind of feels weird when it is not there.
This is what I do.
It shouldn’t be a talent. Or at least not one so deeply buried.
Not once has dragonrage been mentioned
Agreed. Though if I am to be honest, it feels like a lot of our talents should have been class abilities. Our tree basically feels like they didn’t wan’t to come up with fun abilities or interaction, and just stuck so many things essential to the class in as a talent. 
Well this is what started it all, which is very clearly a dragonrage opener. soooooo
Provably wrong
Its the opener everytime.