User blog comment:FairyRaven/Fairy Tail Chapter 470: Hybrid Theory, Review and Commentary/@comment-1359322-20160125125836/@comment-1359322-20160125131449

The only one we've seen that has fight Acnologia on equal is Igneel, who despite not at full strength, is still stronger than any of the humans we've seen to date. And i sincerely doubt God Serena at his best can be at that level. If he is then it'd be a bigger BS to me since it means that God Serena is an equal threat to Acnologia.