User blog comment:Omega natsu2/Episode 188: Attacking Lightning!, Review./@comment-112.198.79.220-20140628162203/@comment-4829046-20140628164558

The anti-Nirvana mages were literally at the "end-of-arc-exhaustion" stage so obviously it would look like that. I know stamina is iffy in FT but you can't deny that the Rune Knights caught them when they were at their weakest. True enough that catching them in the runes was one of the smartest things ever done. Makes more sense than using items/units that are apparently super-effective against mages.