User blog comment:Monkey.D.Me/YURI-TAIL!!/@comment-3290324-20121210003057/@comment-3290324-20121210022324

Don't be ridiculous. Gray would never have beaten Ultear without Ur's help. Furthermore, Erza's fighting style revolves around Armor and weapons. Which can be aged by Ultear's Magic. Mirajane's Magic can't be aged per se, but I doubt aging is all Ultear has up her sleeve. Kagura has only shown the ability to sword fight so far so we can't really judge her, but, she's likely on Erza's level which is why I believe Ultear is stronger than her. And Minerva's abilities are unique, but something tells me Ulear is stronger. Maybe my assessment is wrong, but who knows.