Hello guys and a happy hasaki to all of you.
Im a MASTERY 7 YASUO player in Diamond.
This hidden korean strategy made me climb from silver 5 to dia 5 in less than 2 days!(not a lie at all)
Trust me!

Thats a standard Runepage for Yasuo- with a korean twist!

Some people might say that triumph is better than presence of mind. Those people are not korean enough. You need presence of mind to press your ult-cd on a slim 20 second cooldown.

In korea we have saying: If your Hasaki is up, you dont need a team.
You dont need a team as long as you are a fed yasuo.
To stay true to the yasuo-etiquette you have to ignore your team, if you are not fed as well. If you go 0-10, just flame your jungler!
Examples for when 0-10: - "omg no ganks"
- "hey jungler, wake up, im getting camped"
- "better jungler wins"
- spaming missing pings
- "classic 1 vs 9 game...i tried but team too heavy"

Yasuo evolves around attack- and movementspeed. The obvious choice for your first item is Blade of the ruined King.
Also the Blade of the ruined King gives you lifesteal, which is op af. Cause you not only get hp from hitting people...no!...you steal the hp from them!
If you dont rush blade you wont last long in the korean soloqueue!

The other 5 items are basicly useless. You only need BOTRK. You can go tank, you can go full AD, it does not matter. You are Yasuo...you are op. Dont worry about items. I personaly prefer the full-AD version, just for the sake of the fun. But if you want to go full tank after the Blade, its up to you.