NO TO UNDERGRAD - she has an edge being from another discipline, believe it or not. Make work for a few months. Have a professional photographer take pictures of it. Portfolio - yes. that's all in the application requirements, the specifications are all different and quite rigorous. Those programs are prestigious and may take a few attempts applying to get into. Northwestern or Berkeley are the only on that list with prestige in art. That said, if she can get fully funded anywhere, apply to all. Critical theory - yes, you do need that in a good MFA program, but it's not everything. You need to be able to write about your work (does she have work to write about?) What does she want to do with her art? If she just wants to paint, why go to school? This is the attitude or premise to assume. There has to be a reason she wants to pursue the discipline.