Kassadins laning phase needs gutting
I only need to type 1 letter to explain how to play Kassadins laning phase vs mages: Q. Thats it. U just need Deathfire Touch, and his laning phase is so oppressive its stupid. There is no outplay, no juking, just walk behind your enemys ranged minions and press Q. Your shield and passive + DFT will win the trade for you. There is no skill involved in any way, shape or form.
Nerf the damage, cooldown and mana cost. That shit should NOT be allowed.