Does Duplicative Incineration Stack?

Duplicative Incineration Fireball deals an additional 34 damage, and has a 5% chance to launch a second Fireball. Firemind Consuming Hot Streak grants you a 8 Intellect for 12 sec. This effect stacks up to 3 times.

Does Wildfire Azerite stack?

Azerite Armor for Fire Mage

Note that you can have the same traits in multiple pieces and their effects will stack up to three times.

Do Azerite traits stack?

Azerite trait stacking is a good thing, and almost all traits are stackable. And remember, you can check bloodmallet to see how much each stack of an Azerite trait is worth for your specific spec. You can also check trinkets on there!