You have several posts along these lines. I can see you really look up to the Ivy league, but perhaps it’s better to first focus on finding a good fit she’s likely to be accepted to instead of starting with the longshots. Keep in mind, too, that Brown and Dartmouth and Columbia are all Ivies but few students would be equally happy attending such disparate schools. Unless all that matters is being able to say they attended an Ivy I suppose.
You write she loves the East Coast. So find schools of the size & location & type she likes. If it turns out some Ivies are in the mix, that’s fine, but IMHO you’re starting from the result and working backwards. At schools with sub-10% acceptance rates (and that’s probably overstating it for the non-legacy non-athetic-recruit applicant) that is a recipe for disappointment much more often than not.