LeBlanc is the Anti Mage Mage
So is Zoe, but honestly shes just a ranged Assassin, i wouldn't call her a mage, thats just what Riot calls her
Assassin's rely on their Mobility to be able to kill targets effectively take away their ability to use mobility effectively and you've got ur self and anti assassin
Enter Nubari
take gander.
I designed her to use traps to make it difficult for assassins to move in her area of influence, shes also got ways to knock them back if they do close the distance and lock them down if they run away after a failed assassination attempt. To hit home further on her anti assassin advantages she's got a move that will quickly pull her out of trouble and she and reduce the dmg dealt to her if she attacks 1st. Finally she also has great outplay potential. She herself doesn't have much aggressive mobility, but if she catches you in one of her traps alone ur gonna go down.