CH, just out of curiosity, and to make sure we're on the same wavelength, what sort of a 'mark' would you say Lex is? I had envisioned Ash as more of a thiefy sort...getting in, grabbing what's easily available, and getting out before confrontation can occur. Her powers are useful in a fight, but not very useful to make a buck.
Of course, she could have other scams. Maybe she engages in a little blackmail here, a little extortion there...she has the 'me against the world' attitude for it. Or maybe she just means to mug him?
She'd probably be a good mugger...maybe I'll stick with that. And smart enough about it not to waylay random people on the street. She picks her target, stalks him...makes sure he's got cash and makes sure he's not armed, then takes the wallet and gets the flock outta town before her description circulates and the MiB's come looking.