In your laneing phase with Yasuo you want to always be aggressive with your E as long as you can.If your going against a weak early start mage,just poke as much as you can.In mid game you want to roam to bot lane and pick up a kill or 2 if you are able to.Team Fighting with Yasuo is easy,you just want to go behind enemy lines with your E and kill the carry,then focus the person without their Flash or someone without an escape.If you have someone that has a knock up on your team(even if it's just you)try to ult as much as you can,its on a short cool down so don't be afraid to use it.Late game with Yasuo is just a representation of what you did mid and early game,if you did good with this build you will be able to 1 v 2 their team,if not you wont be useless as you will be able to peal for your ADC


My clip showing you what you can do when roaming down bot lane.