User blog comment:Miskos3/Fairy Tail 521: The Strongest Wizard, Review/@comment-3045936-20170212214706

I could see the three siblings winning for this reason. Ajeel and Jacob already had battles. Ajeel's took Ezra, two Jupiter shots, and a crap load of distractions before they beat him. Jacob's was ehh, but at least Makarov battled him too and he was a powerful wizard even in old age. So maybe they haven't recovered completely making them easier to battle.

As for August and Gildarts, let's think for a second. Makarov said during the games Jura the current 5th strongest of the saints could be a challenge for him. Now that was over a year ago. He could have gotten stronger, plus it's the type of Magic he uses too. Maybe he is near or even at Spriggan class level of Magic Power. So image the strength of Crash with that force of Magic behind it. But still I see August winning, I feel he doesn't know all different types of Magic exactly. But has the single ability to use countless types, from his own experience in Magic development.

I have come to believe that the Spriggans are the literal definition of a glass cannon. Powerful but can't take much or any damage.