Nikenick
Smash Journeyman
Learn to readIt's Dair for horizontal or diagonal DI, and it doesn't matters what aerial you use for vertical DI since you will fastfall it anyways.
In theory, you stop your vertical movement by Fastfalling an aerial, Fastfalling isn't move dependent so it doesn't matters what move you use. But, you have to know that dair on the cstick will automaticly make you fastfall. You can get the same result by fastfalling a Fair, Dair, Uair and even an Nair, but you have to time it perfectly, which is almost impossible to do.
Oh and I don't know who keeps changing the frame data, but first dair was the fastest and now the ultimate pit guide says that bair is? This is confusing me.