Replying to Advice on women's skis and sizing

Hi all,

I'm looking to buy some skis for my girlfriend for her birthday. She's a good skier but for the most part sticks to pistes. she'll be doing a bit of park and off piste for the first time this year.

She's probably about 5'3 or 5'4.

I've been looking at the atomic vantage 85 and 95 women's version in 154 and 15cm lengths but then i saw a great deal on the faction Heroine at 162cm. Will that be too big for her?

Anyone ridden any of these skis and got an opinion?

Any help is greatly appreciated.