Looking for a Ranma BTVS cross

[EPJ_III]

Looking for a story that has Ranma and Shampoo affected by Willow's empowering the potentials spell. Unfortunately for Ranma the slayer powers are weaker than his Ki enhancements and block them from working. When he tries to break the spell on him Willow feels it and keeps it going. Ranma trains with Colognes help. They work to break the spell using Amazon artifacts to protect Ranma from Willow's retaliation and end up cancelling all the potentials enhancements. I thought it was titles Unwanted on FanFiction.net. Either I was wrong about the title, it has been removed, or the FanFiction.net search can not find it.

[weaponx9]

you where almost right, it's called Unwilling by GuyverChaz.
http://www.fanfiction.net/s/3185961/1/
i'm quite sure thats the one you want.