User blog comment:Grnmachine1/A little help please/@comment-27354957-20150729005100

So from what I saw, at Base form, Aang > Gust, due to his wider arsenal. But Gust might win here, due to his ability to change into his ultimate form at will, and Aang requiring time to power up.

But something you forgot was Aang's Energy Bending. With it,he could steal Gust power in an instant if he so decided. As his Energy Bending could work on him, given his "Airbending"