Anivia Frostbite new passive idea

Ok since people are suddenly complaining about RE combo I thought about it and came up with an idea.

E : Frostbite NEW PASSIVE: Anivias spells apply a stack of chill on the enemy champion, stacking up to 4 times ( approves). Frostbite deals an additional 30% damage for each stack of chill (max 120%).

This would solve Anivias instant RE combo, Grating only 30% extra damage instead of the usual 100%. This also rewards Anivia for keeping enemies in her Glacial Storm. It allows her to deal 20% more dmg than usual if she somehow manages to keep the enemies long enough in her ulti, either by wall or by stun. Note that since her Flash Frost hits twice it grants 2 stacks of chill so it wont make her damage completely obsolete pre-6.