Hit her with aphrodisiacs and focus on damage negation while you whittle her down. Panacea and mini elixers are also a must. You also might be over investing in spirit, I beat her with 6 spirit at level 50. high willpower and allure will let you take more hits and deal more damage. Ass fondle massage and cloying mist are all good for exploiting her weakness also teleport because you cannot survive while in any stances.