Other than assuming she is RH, there isn’t enough information to answer this question.

T350 is not a bad starting point. Without knowing her level of athleticism or strength, she could fit into irons or do better with a set geared more to utilizing hybrids through the 7 iron.

If she is beginning, hopefully she had taken lessons at a local course to introduce new golfers to the game. That teacher can suggest a starter set for her. Even if is 3 irons, 3 hybrids, 2 wedges, a driver, and a mallet putter.

I am pretty sure our TT Staffer Lisa is gaming T350’s and kicking my every time I play her. Either one of the two you mentioned in the right shafts should be good for her.

For a complete beginner the 400's are great but the 350's are awesome if she has a year or more experience...IMHO

I believe either set is a good place to start. The reality is a session with a Titleist Fit Crew member will lead her to a set that will work and should be good for a few years.

I play the T350's love them was fitted for them. Thing is I think they are great for any level of player from high to low just get fitted and if things change later can have them adjusted to fit.