Unless your game is very optimised and you need 9th level spells, don't bother. I've CODzillaed with 6th levels spells at lvl 18th before.
If she wants wings, wildshape, healing blasts and Wis to AC, she'll be a sucky character, but perhaps she'll have fun till she the character dies. You can't force the optimiser within, it must grow naturally.