User blog comment:Miskos3/Fairy Tail Episode 231: Gray vs. Doriate, Review/@comment-24277053-20150502095834/@comment-7418318-20150502154840

As a single fighter Doriate is indeed weak, but as a support for others he can be absolutely devastating (if he can keep control of his magic). Just look how easily Minerva was able to deal with Erza up to the point where Doriate lost ctonrol of his emotions.

If Succubus Eye or Tartarus had kept him on a tighter leash he could have been the ultimate weapon, capable of rendering entire armies or guilds next to helpless.