About the electrocute
The electrocute is one of the most common keystone in the game. And what i wanna talk about is the "common" of it. Actually every champs can use electrocute, but i think what riot wants for this keystone is apply on assassins. My sugesstion is reduce the time between the attack/spell to active electrocute which will make it harder to active but increase the dmg or reduce the cooldown. I think its would be better for an assassin.