You're nerfing Viktor and LeBlanc in the wrong way

Viktor's damage is not necessarily the problem, it's his shield and his movement speed. LeBlanc's W damage isn't the main problem, it's her mobility and her stupid tether length. I would suggest increasing Viktor's Q cooldown by 1 second at rank 5 and reducing the movement speed by 10%. I would change LeBlanc's tether to extend to the length that the projectile shows, and I would increase her passive CD by 20 seconds.