This comp revolves around Yasuo as the main carry and surrounds him with Nightbringer units. This provides the team with a lot of utility and frontline for Yasuo to build up his damage throughout the fight.
You will ideally go for this comp when you have good items for Yasuo. This means you have more Bows to make Yasuo's items. Finding a lot of copies is also important as you will want to 3 star him as your main carry.
Level up to 4 early if you want to start a win streak. Level up to 5 to try and continue the streak.
If you're weak in the early game, you can opt to save gold and lose streak instead.
At Round 2, level up to 6 regardless of your start. Put together the strongest team you can.
At Round 1, level up to 7. Roll a bit to stabilize your comp if you are weak.
At this point, you can choose to slow roll for a 3-star upgrade, or level up to 8 for a consistent power upgrade. You can look for your 3 star at level 8, but it may be too expensive unless you are rolling in gold.
Try to simply have a board with good frontline and backline. Using units like Nightbringers and Legionnaires will help transition into Yasuo.
By this point, start building around Yasuo and put in more Nightbringers units that you find.
Yasuo will be a very powerful carry at 2 stars, but you will want to move him around the board to make sure he isn't hit by enemy abilities. His range with RFC is only 2 hexes, so try to place him in an area that is safe.