It wont touch anyone as there is time to exit the lb, unlike melee lb where you have almost no way to avoid it.
As a rdm i dont have nothing to stun/bind/gravity/sleep people.
So i would suggest to change how it work, here's an idea:
After launching Mage LB, the meteor will pop up 5-10s after the "red circle" disapear.
Making it more difficult to avoid, but not impossible to thoses that have kept an eye on it.