Vi vs Talon

Hit an enemy with a spell to activate Blast Shield (passive): it charges over time, and every third hit on a target lowers its cooldown.

Hit the same target three times: Denting Blows (W) adds damage based on their max health, removes some of their armor and gives you attack speed.

Cast Relentless Force (E) on a minion in front of your opponent: the shockwave also hits enemies behind the target, with full damage.

Charge Vault Breaker (Q) out of sight before you show up: fully charged, it deals double damage, and it stops on the first champion hit to knock them back.

Cast Cease and Desist (R) on their carry: you're unstoppable during the charge, and enemies in your way are stunned. Don't stray too far from your team.

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.