User blog comment:Wrath022/Chapter 517: Wendy Belserion, Review/@comment-24489996-20170117142631/@comment-7418318-20170117153128

Yeah nice analysis, except for one thing:

"Minerva who fills in the role as apparent strongest of Sabertooth, so it’s Erza who takes her out. Erza’s magic pool is not only extremely inferior to Minerva’s, but she is extremely unequipped to take on the person who can swap who is attacking who in an instant. "

It was never stated that Minerva has more magic power than Erza. Remember that Erza at that point had defeated the entire Pandemonium event !!without even using her second origin!! Erza's leg wound and Minerva's OP magic sure were big advantages to her opponent, but she didn't have less MP than Minerva.