Monado does not work on humans, at least at that point. You should have known that by now
Oh, wow! Didn't even make that connection. :-Oremember the Monado bouncing off of Fiora when Reyn was "wielding" it back in the beginning of the game?
So, uh, what would Shulk do in that situation? Just let his teammates handle the battle and play a support role with healing, etc?