User blog comment:IamJakuhoRaikoben/Chapter 452: The Prelude to the Final Battle, Review./@comment-26389992-20150914221641/@comment-1776824-20150914225023

Jellal is much more powerful than people think. He essentially got defeated by Natsu because underestimated him, was already wounded from his skirmish with Erza, and was trying to avoid destroying the tower. If you want a true measure of what Jellal is capable of, look at him matching the OS in every regard using little to none of his magic. Jellal has knowledge on a lot of different kinds of magic, and he was able to become a Ten Wizard Saint with only a fraction of his power. That alone should tell you how much Magic Power he truly possesses, or at least possessed then; by now it's probably much greater. Him vs. August is just a fight that should happen. Also, any fight with Jellal is going to be a good fight, plus Haja vs. Sieg Hart. They are the Haja and Sieg homages to Fairy Tail. They literally have to fight.