I have noticed that when a warrior with fist of the titan is blind the fist of the titan seems to fail. Maybe it's been a string of bad luck for the three warriors I know with it, but the fist kicks in during disarm attempts all the time when they can see, but when blind, they get disarmed like it isn't even there. Could be buggy re: blind fisters. (Don't let your mind go to the gutter.)