"623d(2)-66-6c-6d-6c-6d-5c-Aerial"
I think I just can't get down that dash to 6c at the start. Do you have to be really fast, or is there a specific timing to 623d, or are you supposed to wait during the 623d?
Other than that, this combo is pretty useful online, though I do think a simple 2b-5c-623b-5c-6c-6d-66-6d-5b-5c,3c is a lot more useful in comparison.