How dependable is Yorick

He's pretty amazing in laning phase versus anyone (non-stop poke and sustain once you have a Tear), but his team fighting is kind of without a role. He's not a tank, but he's not a damage carry, he can split push but he's not a Trynd/Udyr level threat, and his ultimate is pretty easy to negate once you start going versus people who have played against it before.

Go check out some of Inverted Composers Yorick matches though if you want to see him played at a Challenger level. There's also a Russian guy who I cannot remember the name, who was playing D1/Masters as nothing but Jungle Yorick.

Don't play him vs Nasus, that's about the only rule for not going Yorick. Rest is ok. Buy him. Hard to learn imo though.