Lets give Fizz and Zed the Katarina Treatment
Base Health and regen down. Health per level up.
"For one of the heaviest snowball champions in league, Katarina's lane-bully potential is enabled by having the base-stats to win wars of attrition with enemy mids, whittling them down for the kill. We're pulling back on that to give her opponents a better window of vulnerability to exploit."
General HEALTH PER LEVEL: 80 ⇒ 83 BASE HEALTH: 560 ⇒ 510 BASE HEALTH REGEN: 7.7 ⇒ 4.5
This was the nerf katarina recieved back in 5.6, it toned down her power significantly in lane and made her feel a lot better to play vs.
Why not give it to Zed and Fizz? Two melee assassins that out trade pretty much every mid laner in the entire game.