Crouching Medium Kick
One of his best go to anti-air normal. His lower hit-box allows him to counter most jump-in attacks (with the exception of maybe Dhalsim and Zangief) clean and with relatively lenient timing. Its not very damaging but it gets the job done.
Standing Medium Kick
A more situational anti-air normal, this move is often used to counter longer-range jump-ins. It doesn't have long active frames so you need to be precise when using this move.
Crouching Heavy Punch
This is one of Abel's most punishing anti-air moves as you can follow up with Falling Sky or to Soulless after the juggle, if you hit this right. Aim to land this move at the tip of his elbow to launch the opponent.
Close Standing Heavy Punch
Close up, this move does two hits; one straight forward and the follow-up like a small uppercut. This uppercut can actually beat out a lot of jump-ins (or at least trade) up close and even cross-ups. The punch needs to be done when the opponent is quite close, else you'll screw up and get his long standing heavy punch instead which does nothing as an anti-air.
Diagonal Jump Heavy Kick
The angle is perfect for air-to-air combat; just jump and stick it out there the moment you see them jump. It should beat out most jump-ins.
Diagonal Jump Heavy Punch
Pretty much the same as his jump heavy kick, except that the angle is slightly different. I use the two interchangeably depending on where and when the opponent is in his jump.
EX Falling Sky
The only one you should use as an anti-air special, ever. All non-EX versions will 95% of the time trade and the other 5% cause you to get stuffed. EX Falling Sky is a lot more dependable, does a ton of damage and sets you up for Marseilles Roll setups.
