I know on the last version of this site trying to find the right ranks for the Kaguya clan jutsu was always the hardest part so below are what I would suggest and then the staff can decide. Personally I'd like to see my old clan back on the lists.

Dance of the Willow - C
Dance of the Camellia - C
Dance of the Larch - B
Dance of the Clematis: Flower - A
Dance of the Clematis: Vine - B
Dance of the Seedling Fern - S
Ten-Finger Drilling Bullets - B

These are the ranks I give for the kekkei genkei in terms of strength, speed, cost of chakra, and among all else how kimmimaru demonstrated them in the series.