User blog comment:IamJakuhoRaikoben/Chapter 444: Emperor Spriggan, Review./@comment-26451407-20150715003857/@comment-96.24.244.24-20150715031251

Jellal would be #1 because he posses the most destructive spells such as Sema, Alterias, Abyss break and other heavenly body magic. He also posses Projection magic, Telekinesis, and Darkness magic. He also has Mystagon magic. He is the most skilled mage of the list given.

Gildarts would be #2 because he did destroy a mountain with a punch. He does posses destructive crash magic but he isn't that talented when it comes to magic but he does have raw power not as much as Jellal though.

Hades would be #3 because he did psses some powerful nukes enough to be cause damage across tenrou island and he also possesses Grimore Law. He has living magic but the actually power of it is unknown.

Laxus would be #4 because his lightning magic was destructive and he ds know Fairy Law.

Mard Geer last because his nukes aren't that powerful everyone tanked them and they also tanked his thorns. His MM spell is featless.