Assuming by drawlength you mean her actual arrow length, and assuming that her draw weight for 36~ limbs at clicker length is around 26# (23" actual draw, and loosing 2# per inch, Easton charts say she needs XX75 arrows as the X7 will be too stiff.
XX75 in 1416 spine.
To really get teh selection righ though, you really need to measure her current arrow length, determine if she wants the same arrow length for the new ones, and measure her draw weight with her current limbs at her actual draw length.
If her actual arrow length is 25.5", and she actually draws 28#, then X7's in 1514 spine would be right.