Hey K9, I agree with the Menthol Sampler pack idea since we don't necessarily have a Pall Mall flavor. When I tried Pall Malls YEARS ago, they were really strong so I'd suggest a stronger menthol with a stronger tobacco flavor too. Maybe a Dunwoody (Dunhall) Menthol with the sampler pack? Dunwoody Menthol is one of my favorites because the menthol is really "cool" and the tobacco flavor is very prominent but not overpowering so you're not just
vaping straight menthol.
I also looked up the nicotine content per each Pall Mall analog and the nicotine is pretty high, 1.7mg per cig. I'd suggest 18mg at the least to start. I'm always hesitant about having people start off at 24mg because I don't want their experience ruined by too strong of a hit. But I'd stick with 18mg just to see if she likes it.
I hope this helps, let us know how it works out for her!