@Meddler, The Illaoi E "Buffs" dropped her winrate by 5% and made her feel worse. My suggestion.

Rework her E completely. Here is my suggestion.

E - Test of Spirit | 70 Mana | 24/21/18/15/12 Second CD

Illaoi summons a tentacle from her idol that reaches out in a target direction, stopping on the first enemy unit hit. If the tentacle hits an enemy champion, it links their spirit to Illaoi for up to 10 seconds, pulling them to Illaoi slowly.

Enemy champions are slowed by 1-99% while running away from Illaoi, depending on how far they are from her, and may move around freely while being pulled. If they break the link with Illaoi before the duration ends by walking far enough away, they are stunned for 1.5 seconds.

Notes

It would work like a bungee cord. The farther enemy champions are away, the harder it is for them to move until it finally breaks the tentacle linking them together. If they stop moving while far away from her, it almost instantly pulls them to her. This also fits her theme better (she is never seen pulling spirits and attacking them in any of her teasers, and she does this exact thing to the captain in her minigame). I feel like this would make her a balanced and healthy champion and be good in the current meta.

~A humble but annoyed Illaoi Main