LeBlanc Distortion return range

Champions who make use of kit objects such as Orianna, Zed and Azir can't make full use of their abilities without being in range of their respective objects. Is there a max range that LeBlanc can't blink back to her Distortion pads? If not, why is allowed when Zed has a range indicator to return to his shadows? There is a lot of strength for LeBlanc to evade death but with her high burst potential from Sigils or Distortions is it warranted?