No C’s are required at level 8 to fulfill composition. B+A directly connected in each pass is enough for a 2 pass routine.You need 3 tumbling passes if the first 2 aren't up to level, so that you don't receive the composition deduction. A 2 pass routine with no composition deduction needs B+B (FLO+FP)in the first pass and C+A or C (3/2 + FT)in 2nd pass. If you did a 3 pass routine you need only need 3 Bs or 2Bs and A+A.