Lux Nerfs
TL;DR Make Lucent Singularity have a flat mana cost of 130 at all levels instead of scaling up to 130.
Lux honestly was a good champion until s6 hit, but now she isn't just good, she is really strong. I am not saying that Riot should gut her, because she is actually a good and necessary champion to have as a mid laner, but she is just way too powerful to be kept at this current state. The main reason being is she doesn't have a weak early game to compensate for her strong late game. My suggestion would be to nerf her early game by making her Lucent Singularity (E) have a flat mana cost of 130 instead of scaling up to 130. The spell's damage isn't that oppressive, its just that yes, the damage is good, but its mainly the fact that she can spam it early game to push waves, trade, and farm. She already scales hard into the late game, so making her have an extremely safe early game doesn't really make a lot of sense.