Introduction
This is a new composition of this new patch, and is now one of the best comps for sure. In this composition, you have to play Slow Roll in level 5, until you hit the Yasuo 3-star. This composition is played with a tactic called Slow Roll, which mean that you will stop in some levels to roll above 50 gold, to find some 3-star units. Your main carry will be Yasuo, and your secondary carries will be other True Damage and Viego. As for tanks, the items will go in Mordekaiser.
Augments
The best augments are Cybernetic and Combat Augments. Also, Economy Augments are very nice as you will need a lot of gold to roll down for 3-star units (you should never have 3 augments of this type, one or maybe two are fine, but no more). Furthermore, the augments that give you items are not bad because you will have Akali and Viego as the off-tank units, and the items that you may have left over from Ad can go in Qiyana. Additionally, it is important to emphasize that because of being a Reroll composition, any augment that gives you experience should never be take.
Best Augments
Items
Yasuo best item is Infinity Edge. The other two best items are one healing item like Hand of Justice or Bloodthirster, and Edge of Night (Sterak's Gage or Titan's Resolve are not so bad). Tank items, whenever possible, go into Mordekaiser before Ekko (except in situations of not getting ekko level 2). Akali will be the off-tank holder, with two healing items like Hand of Justice or Bloodthirster and Edge of Night (Sterak's Gage or Titan's Resolve are not so bad). Other interesting items would be the Sunfire Cape since it is very good in early and reducing the healing of the enemies is very relevant, and Thief's Gloves since it is generally good.
Best Items
Other Good Items
Positioning (by @_Garchompro_)
Yasuo needs to be on the same side of the enemy on the second row.
Best Positioning
Early-Mid Game
To play this composition, you need Yasuo headliner +1 True Damage. If you can't find it level 4 is not so bad, but it is essential to have it at level 5. So, at level 4 you play Superfan with the Yasuo headliner, and at level 5 you play Ekko or Senna for 4 True Damage. In this level, you will just Slowroll for Yasuo 3-star.
Lvl 4 Comp
Lvl 5 Comp
Late Game
When you find Yasuo 3-star, you will just level up until level 8. As soon as you find the 6 True Damage, play them instead of Superfan.