Nevermind, I found it. It's the additional post-loop Combo point you convert into Kenki via Hagakure to line up your cooldowns better and gain extra overall potency.
It depends on how much SkS you have.
<1300 you use 1 yukikaze (2 GCD filler)
>1300 to <1700 you use either of the 3-GCD combo point generators (3 GCD filler)
>1700 you use 2 Yukikaze (4 GCD filler)