Welcome to the Elemental Shaman DPS guide written by Cayna.
What has changed
Pre Mythic Battle of Dazar'alor changes
Echo of the Elementals damage reduced by 33%. This trait before was BiS, now it's been destroyed, basically making the trait useless.
Igneous Potential damage increased by 150%. This trait is now the BiS trait, possibly overbuffed a tiny bit. This will cause talent changes, rotational changes and stat changes. You want to try and obtain 3 of these at all times for raiding, also good for certain affix/dungeon combinations for M+.
Ancestral Resonance mastery increased by 10%. Not impactful, very very minor buff when running this specific trait.