A non-numbers nerf to Illaoi
Add a leash range for Illaoi's E - Test of Spirit that Illaoi can't leave. If Illaoi leaves that leash range from the spirit, the spirit should simply vanish harmlessly. This would introduce a new dynamic into the ability where Illaoi is pushed into staying as a front lane tank/juggernaut and more solidly adds a way to play around the ability (hit her with a giant knockback).
Thoughts?
EDIT: It would also get rid of those pesky situations where Illaoi E's somebody and then runs away from them and they become a vessel as they're trying to chase after her. That feels like an unfair way for that to resolve mechanically (as well as lore-wise).

and
say hi...
and
. You should not have a global attack on a basic ability. That's so unbelievably stupid.