My advice? Getting into a good grad school just involves a really really good audition.Excellent language skills(French German and Italian), good technique and and a good healthy instrument. She should sing really really well. And when she gets in she should be the best student they have (in order to get rec’s) That’s up to her. Possibly not the best path for someone who fears rejection and is not dedicated to classical voice. That might sound harsh, but it’s very very competitive. Just like the music world.