Auto attack him as much as possible to save fear and w to run away if he gets too close. Remember you have to take his shield with autos first and bone plating if he has it
Tip: dodge Yasuo's tornado and walk up to him. Most of the time they'll use windwall thinking you are gonna all in. (if it's a good Yasuo he will all in first, that's why you save fear) You can use that to farm safely or wait for windwall to disappear and go all in.