Introduction
In this composition, you have to play Slow Roll in level 7, until you hit the Riven and Yone 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 principally Riven, and then Yone. As for tanks, the items will go in Mordekaiser.
Augments
The best augments you can have 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 a lot of tanks, and the items that you may have left over from Ad or Ap can go in the Yone or Kayn. 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
Riven will be the main carry. Riven best items are Quicksilver and Titan's Resolve (Edge of Night is not so bad) and one healing item like Hand of Justice or Bloodthirster. Yone will be the secondary carry. Yone best item is Infinity Edge. The other two best items are one healing item and Edge of Night, but, only two healing items like Hand of Justice or Bloodthirster, are not so bad. Tank items go into Mordekaiser. 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, Evenshroud since reducing Armor is very good (it is advisable to put this item on Mordekaiser since he will be the unit that will tank most), and Thief's Gloves since it is generally good.
Best Items
Other Good Items
Early-Mid Game
To play this composition, you will need the Yasuo headliner (better +1 Edgelord than +1 True Damage). Then, you will play more Edgelord units. At level 4 you play Evelyn for Crowd Diver. At level 5-6 the best would be to have 5 Edgelod. In case you don't find Edgelord units, Superfan is not so bad.
Lvl 4 Comp
Lvl 5 Comp
Lvl 6 Comp
Late Game
At level 7, is when you fully direct your composition towards the final table. In this level, the best is to play 7 Edgelord and Mordekaiser. You will roll above 50 gold to find Riven 3-star and Yone 3-star. It's highly important that you sell your early headliner before you roll, to have more opprtunities to find your final headliner. You need headliner Riven or Yone +1 Edgelord. If you can, any other 3-star unit is good, but the principal are Riven, and then Yone. When you have find Riven 3-star, you level up, and play Garen for 8-bit. If you haven't found the Yone 3-star yet, roll for him at level 8 before going to level 9.