User blog comment:IamJakuhoRaikoben/Chapter 384: Attack of the Stars, Review./@comment-188.83.193.250-20140516191755/@comment-7418318-20140516193015

A Spirit's power in the Human world depends on the person who summoned them. That Lucy's Spirits can't win against a Demon Gate in a one on one fight only show the limits of Lucy's power.

But considering how even Erza and Natsu had big trouble with just a single of those Demons, it's quite an impressive demonstration of ability that Lucy was able to hold against two of them plus some smallfry for this long.