This perk is so annoying. I decided I would let my companions die if they messed up again. But whenever I do a sneak attack from VATS and the mysterious stranger appears he shoots and kills one enemy. But after that he stays focused on the screen and I can see my char and companions getting attacked, and I just stand there helpless. I've lost Boone multiple times due to Cazador attacks while I was frozen looking at the mysterious stranger...

Are there any more perks that sound really great but should be avoided?