I forgot to add something to my last post.
When she almost completely drained an Elder's AND an Immortals aura, she only had two days left to live. Niccolo was told that she is infanently(sorry, don't know how it's spelled) more dangerous than The Alchemyst. And we know that Nick is dangerous, so Perry has to be extremely dangerous, she wasn't even scared of the sphinx.
Then, when the Old Man of the Sea told Perry that he would make her his wife, she stopped climbing and laughed at him. And said "Do you know who you were sent after?" the Old Man said "I told I could have a sorceress for a wife." or something like that. And Perry laughed again saying "You shouldn't have come, I will never marry you, I am wed to The Alchemyst, Nicholas Flamel." Old Man of the Sea then said "Ohh, The Sorceress." and so on. Why would an Elder be scared of an Immortal.
Then with Areop Enap, he said that Perry brought a MOUNTAIN down on top of it. How could she do that, she only knows a little bit of Air magic, she doesn't know Earth magic.