Saw one of these but it's so unbalanced I decided to make my own.
R1: Original Release vs Sage Mode
R2: Hollow Release vs V1 Kyuubi
R3: Vasto Lorde vs V2 Kyuubi
R4: Incomplete Fullbring vs KCM
R5: Complete Fullbring vs KCM2
R6: Fullbring Release vs Bijuu Sage Mode
R7: Dangai vs Six Paths Sage Mode (Base)
R8: True Release vs Six Paths Bijuu Sage Mode
R9: Horn of Salvation vs Asura Kurama Mode
BR: Composite Ichigo vs Composite Naruto
"Release" means Shikai and Bankai e.g. "True Release" means True Shikai and True Bankai
Each form can be taken from any time within respective series, as long as it doesn't overlap with the form of another round e.g. Naruto can't use Asura Kurama Mode in R8.
Tag me if I missed out any form you feel should be included