This jutsu currently feels like a worse version of the Fire Dragon. It should be tweaked slightly to make it more usable.
What I think would be a good change is:
-Remove the stun on the third sphere
-Remove the self stun from the jutsu
-Make every sphere knockback 1 tile
This would make the jutsu less risky to use since hitting it is very hard and it would also allow you to combo while shooting spheres (the enemy can still sub since the spheres knockback instead of stun).