The most basic combo that you use in laning phase
Rake + Noxian Diplomacy + aa + Blade's End Play Video
If your opponent plays defensively
Noxian Diplomacy + aa + Rake + aa + second Rake + aa + Blade's End Play Video
If you can kill your opponent with passive but your second Rake is about to miss
Rake + Flash + second Rake + Noxian Diplomacy + aa + Blade's End Play Video
If you're sure you can one shot your enemy with close Noxian Diplomacy
Rake + Rake + Flash + Noxian Diplomacy + aa + Blade's End Play Video
Full One-Shot Combo
Rake + Noxian Diplomacy + Shadow Assault + aa + Blade's End Play Video
If your opponent is pretty far but you want to One-Shot him
Rake + Flash + Noxian Diplomacy + Shadow Assault + aa + Blade's End Play Video

Blade's End - PASSIVE
Talon's spells Wound champions and large monsters, stacking up to 3 times. When Talon attacks a champion with 3 stacks of Wound, they bleed for heavy damage over time.

Noxian Diplomacy
Talon stabs the target unit. If they are within melee range, this attack deals critical damage. If they are outside melee range, Talon will leap at his target before stabbing them. Talon refunds some health and cooldown if this ability kills the target.

Rake
Talon sends out a volley of daggers that then return back to him, dealing physical damage every time it passes through an enemy. The returning blades deal bonus damage and slow units hit.

Assassin's Path
Talon vaults over any terrain or structure, up to a max distance. This ability has a low cooldown, but puts the used terrain on a long cooldown.

Shadow Assault
Talon disperses a ring of blades and becomes Invisible while gaining additional Movement Speed. When Talon emerges from Invisibility, the blades converge on his location. Each time the blades move, Shadow Assault deals physical damage to enemies hit by at least one blade.

You can also build Muramana if you want, but it's not necessary (Replace Death's Dance with it). I wouldn't build it, since Muramana is much better in lethality builds. Tear should do work. You can check my One-Shot build if you want. https://www.mobafire.com/league-of-legends/build/takashi202-talon-one-shot-build-they-wont-survive-594479

Talon is the knife in the darkness, a merciless killer able to strike without warning and escape before any alarm is raised. He carved out a dangerous reputation on the brutal streets of Noxus, where he was forced to fight, kill, and steal to survive. Adopted by the notorious Du Couteau family, he now plies his deadly trade at the empire's command, assassinating enemy leaders, captains, and heroes… as well as any Noxian foolish enough to earn the scorn of their masters.