I was trying think to think of a way to make my witch reasonably good at melee at high levels. I wanted to get Spell Hex (Ear-iPercing Scream), Hex Strike, and Prehensile Hair. But I need Improved Unarmed Strike to get Hex Strike, and both Weapon Focus (Prehensile Hair) and Feral Combat Training in order to use Hex Strike with Prehensile Hair. So now we're talking about five feats to make this work.
