Hguohsaid: Her first concern was securing the Stone so as to prevent another God Wars that could wake the Elders and destroy the universe. So no incinerating at the very start.
And by the time the stone was dealt with, she was temporarily not a god thanks to Sliske's machinations within the maze. And even then she tag teamed with Zaros, someone she vowed to oppose, in order to try and take down Sliske (it's not her fault you handled Sliske before she could.).