User blog comment:IamJakuhoRaikoben/Chapter 493: The White Dragneel, Review./@comment-76.161.172.226-20160711151314/@comment-3290324-20160711155536

And therein the fallacy in your logic lies. You're assuming those two are weak. Juliet and Heine being irrelevant doesn't mean that they are weak. Those two are the enchantments of one of the two strongest Spriggans. And while they are childish, being annoying and childish doesn't have anything to do with strength. And for that matter, this wasn't a full fight. Mirajane, for obvious reasons, was in a rush, so she jumped from base SS all the way to a powerful Take Over that severely drains her Magic Power to end the fight quickly. Magic Power replenishes. So even if she did exhaust herself a bit, it wouldn’t have put her down for the count. And finishing those two as quickly as possible was in her best interest. You don’t spend a long time facing foot soldiers when you’ve been told that not only your friend, but the one thing that can end the entire war and possibly the world (Fairy Heart) is in danger.