90% sure bair or uair is best.
@Roager
Almost 100% sure that airdodge does CRAP. The only reason you why you think it does
something is because during the airdodge, you are already naturally slowing down. But if you didn't airdodge, you would get that same affect. It doesn't do anything.
How come no ones responded this correctly?
@Sondergaard
Fastfalling is only for Vertical knockback, if you fastfall for horizantal knockback you are not helping yourself, and you're only going to get yourself gimped if you fastfall. You won't be able to recover.
@face
Go to tactical, find the thread that proves aerials help DI. Also, you were DI'ing incorrectly. When hit STRAIGHT up, you do not hold DOWN. That is OPPOSITE. You hold PERPENDICULAR. Meaning you hold LEFT OR RIGHT.
@Ville
Bair and uair are about tied I think, I THINK. Personally, I think uair ends quicker, I haven't bothered to see frame data.
@TKONTK (you know who you are, rofl)
Dair is only best when you want to fastfall, unless you're doing it by hand carefully, and even then I'm almost certain bair or uair is the better choice. Try using uair/bair (remember to fastfall for vertical knockback though!) and tell me if you live any longer then usual.
Basically:
Aim for the corner blast zones (adjust according to situation however, its not always the best DI, but it makes you live the longest because its the furthest blast zone in MOST cases)
Use your quickest starting or ending aerial. It's best to look for the quickest starting AND ending aerial however.
If extremely high up, after aerial, Falcon Kick adjusts momentum slightly, but you can die before it actually takes affect.... so I suggest not doing this.
Fastfall for vertical knockback, not horizantal knockback.
tl;dr
This shows Link, but you can apply it ALL to any character.
http://www.youtube.com/watch?v=5hQIy7P7RWo