It's ALWAYS worth it to ask for more money. I would just say that the school will remain one of your top choices either way, but some additional scholarship funds would go a long way toward helping you with your decision, and outline what your other options are.I did this with similarly ranked schools and it worked wonderfully. I'm not sure about with a lower ranked school, but ultimately they want you and you never know what they'll be willing to shell out to keep you. GOOD LUCK!!!