I was thinking electro ballI don't know about broken, but Speed Boost would allow it to minimize its Speed investment. It's so stupidly fast that at +1 it's going first 99% of the time. Could run an Adamant nature (maybe Naughty if you want to do some spicy mixed attacking stuff idk) and only enough Speed EVs to prevent a Scarfer from revenge killing. Probably dump some points into defenses, too.
