Zed vs Talon

To kill, cast Death Mark (R), then Living Shadow (W), Shadow Slash (E) and Razor Shuriken (Q): with two shadows, you throw three shurikens.

Cast Death Mark (R) just as the enemy casts their decisive spell: during the dash, you're untargetable.

After Death Mark (R), save the recast to get out: you swap places with the shadow left at your starting point, far from the fight.

Save enough energy for a full combo rather than casting your spells for nothing: Living Shadow (W) refunds energy when you and your shadow hit the same target.

In teamfights, go around the sides and save Death Mark (R) for an isolated target: going in from the front exposes you to the whole team's CC.

Get out of the path of Rake (W), especially on the return: the returning blades slow you, and each spell that hits brings you closer to Blade's End (passive).

Push your wave whenever you can: he then has to stay and farm instead of roaming by vaulting walls with Assassin's Path (E).

If you can engage, go for him while Shadow Assault (R) is on cooldown: it's his main way out of a fight, and it comes back in 100 to 60 seconds.

Ping your team as soon as he leaves your vision, and ward the paths behind walls: Assassin's Path (E) lets him vault walls to roam through the jungle.