Laning against Illaoi: My take
The boards are getting flooded with discussions about the new champ right, and they generally amount to "plx nerf" or "lol lern 2 dodge, nub," neither of which seems particularly helpful to me. For my own part, as much fun as I have playing her, her AD ratios probably need to be lowered a bit, and I think either her passive or her ult needs to be limited (but not both). Anyways, I've been playing as her a lot, and figured I'd take a page out of her book and tell you how to beat me (at least in the silver division, I'm not exactly a pro).
As far as your picks go, it's no secret that she struggles against ranged champions, but she's also got a pretty weak level 1 game. she can q you in a trade, and that's about it. I've had luck beating her by choosing a champion who can outrade her at level 1, going for the hard engage, and then not letting her recover from it. Shen has worked well for me. The key here is that you have to be ahead of her by the time she gets to level 2, because once she picks up her W and can bring her tentacles to bear against you, you're going to have a bad time in trades if you've been going even.
Dodging her Q gets mentioned a lot, but more noteworthy is its mana cost. If she's spamming it in lane, just let her. Focus on dodging, even at the expensive of farming, and let her run dry. She is very vulnerable to harass at this point. Don't let her stand back and recover her mana, get in there and bully here away from her farm. As far as her E goes, it does NOTHING to minions, and if you can keep them between you and her, it's no threat. Even better, it starts with a fairly long cooldown, and you will have an easier time winning trades against her when you if you go in immediately after she botches one.
Now, if you DO get grabbed, you have to make a quick decision, and which one is correct is going to depend on both who your playing and where the spirit is laying at. If you are a tanky champion with high health and a lot of armor, it is actually best sometimes to just let her wail on you and keep farming out of range of her abilities. She cannot, for example, make a full health Malphite into a vessel on her own, even with the help of a tentacle. If you are not a champion who can take the hits, now is the time to use whatever CC you have. The big thing is don't just run away, unless you are already at low health (and will probably have to back). Find a way to hit her back, and do NOT position yourself in such a way that she can strike both you and your spirit with her tentacles.
Speaking of tentacles, there is a right time and a wrong time to clear them. One of the most delicious things for Illaoi is a meleer going to clear a tentacle that is set apart from minion waves. If she knows what she's doing, she is going to E you as soon as you approach it, and then hit both you and your spirit with her W and then her Q. Clear them when she's preoccupied with farming somewhere else in the lane, or if you have a cluster of minions to block her E.
One of the quickest ways to lose lane to Illaoi is to gank her. It's dangerous. Not impossible, but it's risky after level 6. She excels at 1v2 fights, and junglers who gank solo lanes generally expect their victim to try and flee and make a hard commit to the engage. A good Illaoi can just stand her ground and fight you both, and if she catches 2 people and a spirit in her ult, an attempted gank can quickly turn into a double kill in her favor. You have to approach her more carefully if you're going to gank her and be prepared to use whatever skills or even summoner spells you need to to avoid her ult when she jumps up. You do that, and you've got her. If she hits you both with it, it's time to break off before she can kill you.
Finally, in teamfights, don't play to her strength. She loves it when champions cluster around her. Just google "Illaoi Pentakill" to see why - it's ridiculous. She doesn't need to be any kind of ahead to guarantee a victorious fight for her team if she can catch more than a couple peopel in her ult. It's something that a lot of people don't seem to realize. At the same time, her team often doesn't realize it as well, and they may flee from what would be a losing fight with any other champion on the field and leave her to fight you all on her own. If this happens, just CC the crap out of her and mop up the runners.
Anyways, that's what I've figured out so far, on both sides of the lane. Just wanted to get something up here that was a little more substantial than "dodge her attacks" or "dodge the game."
