This Yasuo is too new to me to actually write this, but I’ll give it a try.
This guy I’m facing is playing with 19+ armor-pen\armor\magic-res runes and 21/9/0 mastery’s.
There is no other option then to start Cloth-armor, 5 pots and a warding trinket.
Start safe farming on a distance and buildup rage, when you got a stack or two, go E in W\Q and E out, dont do more then that. By handling him like this, i dont think you will be able to burst him when you want. As soon as i got him down at half hp – i build up a full rage ( and he pushed the minions to our side of the lane, so we have to time chase the kill ) and E in W, Q, Ignite if u have – try to hold on the last E so you can dash in the direction that he is running.
As Renekton i got a great sustain so i dont got a problem with HP after farming that kill, so i stay in lane and farm on. When Yasuo come’s back, he charges me ( because lee sin is coming for a gank ) I kill Yasuo pretty fast and go in for Lee Sin and end up with a dubble kill, 3/0 – first back home.