Awesome work, Weyn, such a wild design!
Would it work to move the left-most circle a bit further left so its distance to the center of his hat matches the other two circles a bit more closely?
The only other item that jumps out is the top-right formula is a bit blurry... is it possible to sharpen that up? If not, maybe push the blur even more, and add some wispy smoke streaks to further make it look like it's disintegrating from the blast?
The font pairing is really cool, and I love the coloring. Expert stuff, as usual!