Putting my reply in the 'Erza Character Disccusion thread' before a mod comes in and does an early spring cleaning.
The topic has moved beyond what she had done in just this episode to all-encompassing.
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As for the actual episode:
Who else, in Fairy Tail, and in the other guild teams could duplicate what Erza did?
I think Laxus stands a good chance to do it, as well as Jura. I'll even throw in 'Mystogun' as a possible. Kagura is up in the air... Sting and Rogue, I'd give them 60 monsters each.