Distortion allows you to be aggressive with your other spells while being able to return to safety.
Using Distortion can help your positioning to land Ethereal Chains.
You can chain Sigil of Malice and Ethereal Chains to prevent characters with blink from escaping for up to 4 seconds.
Stunning or silencing LeBlanc will prevent her from activating the return part of Distortion.
Stay behind minions to make Ethereal Chains difficult to land and force her to use Distortion in a suboptimal manner.