CORRECTION: Neither of the ''1 frame links'' in the combo are 1 frame, 6A+S is something like 5f and s.5A s.663A 214A is 4 frames. (the links are still incredibly difficult even if they're not 1f)

With this combo being one of the hardest to learn in the game, i figured i'd make a detailed tutorial to anyone looking to learn it.
It's not perfect and doesn't cover everything but it covers the most important parts and gives guidance to the problems i personally had when learning it. Hope it helps.

Just in case you missed the inputs, here they are:
2A,[2A]214A, 66,1,1A,1A,6,S+A,66,s.3A,214S, ABC x5, 66,9C,2A xN, 5B, 236C, 66, 9C, 2A xN, 5C

Learning this combo WILL take you a long time, it is not easy and it will not happen even in a week. But its definetly worth it.