These are more and more contrived theories of how she would escape. The fact remains that her Compulsion disappeared after the balefire, which is incredible timing if you think about it. She had absolutely no idea that Rand was even outside the Palace - merely that he'd sent an envoy from the city.

There's a very good chance we'll see a PoV from her in the next book which is on a parallel timeline. Lounging in her chair, she'll think of Rand and screech as balefire hits her like an avalanche.