Nightmare also gives fractal decks a serious problem if played first. (less room in hand for copies of the fractal target) Of course, that cuts both ways (a fractal played first will reduce nightmare's effectiveness) but nightmare is way cheaper to play than fractal.
The discord also gives fractal a problem. Even running over 50% pillars/pends, psiontal needs all the quanta it can muster, and discord takes away valuable quanta. And yeah, a couple reflective shields would be really easy to splash into here; in war 4, Time didn't do that because the psion card did not yet exist.