Singed vs Yorick

Cast Mega Adhesive (W) behind you, then Fling (E): a target flung into the glue is rooted there.

Cast Mega Adhesive (W) under an enemy who has a dash: in the glue, they're slowed and grounded, so they can't dash.

Circle around enemies with Poison Trail (Q) on: every enemy following you walks through the poison, which damages them every second.

Drink Insanity Potion (R) before you dive: you gain power, resistances and speed, and your trail applies Grievous Wounds, which reduces their healing.

In a side lane, draw several enemies into chasing you: they walk through Poison Trail (Q), and that's that many players missing from objectives.

Dodge Mourning Mist (E): once marked, you lose armor, his nearby graves keep raising Mist Walkers, and his units rush toward you.

Kill his Mist Walkers, summoned by Shepherd of Souls (passive), before going for him: a single auto or single-target spell is enough for each.

If Dark Procession (W) traps you, hit the wall to break it instead of waiting for it to disappear.

If you can, take down the Maiden of the Mist before Yorick: summoned by Eulogy of the Isles (R), she carries a large part of his damage and push.

Don't let him split push alone: with the Eulogy of the Isles (R) Maiden and his Mist Walkers, he quickly threatens a tower. Send someone to answer him.