User blog comment:SethHeartphilia/Whos stronger Erza or Mirajane/@comment-26461051-20150604001423/@comment-26461051-20150614013553

...Than Erza will just requip into her Armandura Fairy Armour (her strongest armour), and Mira will use her Satan Soul Sitri (her strongest satan soul); than they will attack each other until they both run out of magical energy... (So it'll be a draw, in other words)