User blog comment:Miskos3/Fairy Tail Chapter 506: The Broken Bond, Review/@comment-153.91.194.203-20161017213839/@comment-153.91.194.203-20161018034130

You're one of those people who has to everything spelled out for you to understand it. Just because it hasn't been said that they are stronger it doesn't mean anything when both of them have far better feats than her. Gray's IDS didn't really give him much of an advantage against Invel and how the hell would God Serena's historia beat him. He may have been somewhat of a disappointment but he is in no way weak so I don't where you are getting this idea from. The dude is spriggan and Gray pummeled him with just normal punches which is far greater than anything Erza has done in this arc.