Draw length?
Every situation is different, but it can be tricky at times getting a newer lower draw weight shooter into a flagship bow. Its becoming easier as manufacturers are increasing offerings in easier to draw options in addition to lower weight options. Just make sure whatever she chooses she can draw smoothly and hold it comfortably.
Depending on where she lands with draw weight and length, that will give some guidance into an arrow build. VERY generally speaking I would likely be looking at something in the 5mm category with a light gpi that put me in the middle if the spine chart with room to add point weight/draw weight for clean broadhead flight, but still really light for trajectory during TAC events.