Kayn vs Wukong

Take Rhaast against a tanky team, Shadow Assassin against squishy targets: The Darkin Scythe (passive) gives one healing, the other bonus damage at the start of fights.

Gank through walls with Shadow Step (E): you move through terrain faster, and you heal when you first enter it.

To dodge a burst, cast Umbral Trespass (R) on a champion you just hit: inside, you're untargetable while your spells come back up.

As Rhaast, hit as many champions as you can with your spells: The Darkin Scythe (passive) heals you for part of the ability damage they take.

Trade after Warrior Trickster (W): it's his best escape, and it has a 22 to 18 second cooldown.

When Warrior Trickster (W) turns him invisible, ignore the figure standing still: that's the clone, and the real Wukong just dashed off to the side.

When he has Cyclone (R), spread out from your allies: he spins in the middle of your team and knocks every nearby enemy into the air, twice.

If you have a way to escape, wait for his second Cyclone (R) to end: the spell can be recast once, and each spin knocks nearby enemies into the air again.