A Champion with a "locked orbit" movement ability

The champion would cast the ability on a target, suspending the the user a set distance from the target. Either the user revolves around the target at a set speed, or moves freely in orbit. In effect, the target wouldn't be able to close the distance to the user for the duration while allowing the user to "hitch a ride" while still being able to cast abilites.

Caviats: would be kind of toxic if cast on melee characters **if **the rest of the kit allowed the champion to, say, kill the melee character. Therefore Ranged attacks would be too strong along with this ability. Skillshots might be fine. The ability would fit well, however, on an enabling support character, whom could use it to stay out of harms way while supporting.

What do you think, forumers?