Is it just me, or are almost all of Illaoi's matchups a case of "lane decided in champ select"?
Pick a tank and she out sustains your damage and can kill you if you try to contest her on test of spirit so you pretty much just eat that damage.
Pick a fighter or assassin and you might have her till first back, then she out-damages you while building tank.
Pick melee and you get poked by Q and if you ever engage you get soul grabbed and she's dealing bonus damage with her Q and tentacles.
Pick someone ranged tho and she just gets chipped away all day, and all you have to do is watch for her harsh lesson.
Some exceptions may apply, like being
post 6 or
who loves being under tower. but it seems like almost everything is either "farm under tower because you made a bad pick" or "she's stuck under tower because you counter picked her"
into
level of counter where there is no way you can kill them if they play it properly. Don't try to kill them, farm up as much as you can without dying, when you get the opportunity, roam to a side lane and kill the enemies there. You can win lane without ever trading with your lane opponent, just because they are in the same lane as you doesn't mean they're your only option, you can even roam into the jungle and find the enemy jungler, some of them get pretty low while clearing and you could score a buff or two off of it, making it much easier to fight your lane opponent if you decide to do so.
