I can understand to some extent the troubles of your friend. It's not easy.
Instead of just healing her, have her acknowledge (if she hasn't already) that she is an empath. This is a major first step.
I highly suggest that she take the steps to educate herself on how to deal with it without being overwhelmed. and can lead a happy, productive and enriched life that sees her gift as what it is: a gift, and not a curse or something.
There are lots of books on Amazon and websites, and also Youtube videos for her to read and watch to understand her gift and utilize it better.
Of course, there's a lot of new-age and xian undertones and blatant hogwash in a lot of these so she has to be able to discern and weed it out and take what it useful to HER, while also acknowledging and setting boundaries for herself and her space and energy so people aren't exhausting her with their narcissism and never-ending problems or have people use her as a welcome mat, dumping their problems on her as people and complete strangers like to do to empaths.
There's a lot of resources out there on how to deal with being an empath and how to flourish and grow as one. I suggest that if you want to help her, continue being her friend and her support. It's probably so overwhelming for her and there's not a lot of understanding people out there. You're one of them.
Good luck.