the single jump j.236C into falling j.B seems to not work on some characters very consistently so i was just trying to find a combo that self-times everything against everyone, even at the cost of more doll meter.
If i were to actually try an optimal combo off of 5C it may be something like:
5C(1)>2C>236C>214A>2C>214A>5C(1)>j.8D>j.C>j.236C>j.214B>j.C>2C>6C>6D>41236B>5B>2C>4D>3C>632146D
I'd personally keep 5C only hitting once because it prorates once per hit, instead of once per full attack like other multi-hit moves.
For an optimal combo in OD, i'd try to squeeze in as many j.8Ds and 2Cs as possible while doing all of the other specials.
Buuut i'm only looking at damage and easiness right now, haven't bothered with doll meter yet.