THIS GUIDE IS FROM A VERY LOW ELO YASUO MAIN AND IT IS NOT FINISHED EITHER! Why did I post it then? CAUSE Y THE F*CK NOT?! And too many caps. Sorry but really. Don't think I'm a challenger main trying to smurf or anything. You can avoid this guide if you feel like it. I will be updating it every now and then for reference and stuff like that! So without further adue! Let's get right into it!

Yo! I'm an unranked Yasuo main. Just making a guide in my spare time. As well as trying to inform many Yasuos how to build and tips and tricks. please note I have never got a penta or anything that huge with him yet. But that will change. I'm mastery 6 with him right now. I hope y'all have fun with him and read this guide knowing I'm probably boosted xD(not really boosted but you know what I mean).

I take flash cause... EQ flash and escape when I don't have minions or champs to dash through.
Exhaust for even more outplaying since it lowers ALL THEIR STATS almost by 50%!!

FLOW:
Use your passive shield to your advantage. To avoid a bunch of burst damage up front. It does NOT get proced off of minions. So remember that. Your dash builds up FLOW as well so. Remember that when outplaying. Using your ULTI gives you full FLOW. So you can use that to avoid some damage in mid fight as well. Remember to not be afraid to attempt to trade with your laner if this is up!!
RESOLVE:
Is not something that you charge. Yasuo doubles his crit change BUT loses 10% crit damage. But you still get DOUBLE CRIT CHANCE! You can use IE to still deal more damage with your crits!

Well.
For skill max you can look above but.
You can use some of the following combos.
For example...
Think you are fighting an Ashe(or someone with a ranged stun) E through a minion, windwall, and then Q. You should cancel the dashing animation, slide forward and do the q animation WITHOUT doing the EQ combo.
The clutch (EQ)flash...
It's hard to pull off but. If done right you will E through a minion or champion, Q then IMMINENTLY flash. It is so hard but so useful when you have two stacks of your Q up and your ulti. So you EQ flash onto the enemy and Q, spinning then ulti.
Speaking of Ulti...
When you knock up a champ you have a second or two window where you can auto attack the champion. So knockup, auto, then ulti, finishing it off with a Q(after the ulti is finished of course) for max damage.

FOR GOD'S SAKE!! WORK. WITH. YOUR. TEAM!
Ping when you're about to go in...
Work with a Malphite or Wukong(any knockup champion on your team)to ult or knock the team up so you can turn almost any fight around with your ulti! Just remember that at level 1(Ulti level) the CD is quite long. Lvl 2 it's pretty short. When you hit lvl 16 and get lvl 3 ULTI don't be afraid to use it!

Overall Yasuo can be broken when played right. Just remember to use dashing sparingly if you don't have many minions or champions to dash through.