User blog comment:SethHeartphilia/Whos stronger Erza or Mirajane/@comment-24446496-20140424024349/@comment-71.50.119.252-20140917052747

That really don't explain how Erza's stronger considering Mira has gotten stronger too. And we still have yet to see the true extent of Sitri abilities. Like everytime she goes there, she barely uses the abilities of that Take-Over spell. It can't be called her strongest form for nothing and what we saw can't be the true extent of it.