Corrupting Potion

Info at top is most up to date. Do inspiration if you want to split push. Otherwise do sorcery and don't take ultimate hat. Take mana band

There's other options. Like Phase Rush works. Electrocute works. Dark Harvest might be decent if you're doing jungle Yorick, but that is more for farming junglers with good gap close like Nocturne. Ultimately Grasp is the best one for him as far as I can tell. I'm sure Klepto would be interesting since he can continue poking with his E and Q. Haven't tried it so not sure if it procs on ghouls or maidens, but probably not.

I'd say Split Push Yorick is your best bet. The other two are situational based on what your team needs from you in team fights.

If you're just split pushing all game then you aren't making proper use of Yorick's kit. He is an insanely strong team fighter with lots of zoning abilities. His role is generally locking down a target so his team can collapse on it, then he just chases down the rest. I don't build insane mobility on him just to split push. It makes him a train in a fight. Really fast and hits hard. Also i believe it lets you heal as well when you land the mist which would go great with how your kit works. Still haven't tested that yet though.

I consider Yorick a objective carry. He carries games hard through pushing objectives.

Lifesteal runes are a waste of a slot. Ultimately i don't value lifesteal on yorick because he primarily heals off his Q and the passive health regeneration items you build on him. His minions prevent him from being focused down so quick healing in a fight isn't necessary.I would always take damage or defense over potential heal on Yorick.

I'll see what I can do. Haven't played much league lately.

Found this buried in one of the reply posts from Lasoor...might help :
"As for Illaoi she is an easy champion for you to counter. Her main strength is her ultimate which you can avoid entirely by zoning her and long range kiting by throwing minions at her. Just don't go in melee range too much and you're fine."

how do i deal with people who regonize the situation and just sit under the turret? any option else than diving?

The way you fight in a team fight is you run in and out bursting the enemies while your ultimate damages them over time. This way the focus isn't on you, meaning you don't die. Once your team is out of the fight and if you don't think you can win it by yourself then you just run and make sure enemy doesn't take a tower.

Generally there is no way for you to win games just by reading what I say though. After you play Yorick enough you'll figure things out for yourself and become really good at the mechanics, to point where you don't need your team.

If your team is doing really bad all game then you have two options. You can either push top extremely hard and kill the enemies if they come to stop you (or run if you can't do that). Or you can use teleport to help your team win crucial fights and then go right back to pushing. When you split push as Yorick it forces the enemy to send 3 or more people to stop you in most cases due to how strong Yorick is. This means your team now has to deal with way less enemies and should be focusing objectives, if they aren't then all you can do is repeat this process until they do. Eventually your team is going to do something and the whole time you're pushing you should be getting towers out of it.

If split pushing really isn't working for you then I'd recommend the new Team Fight build I put up so you can be even stronger in team fights.