if u can crouch cancel, u probably want his infinite. after the {far FP xx whiff low tiger shot} x N in the corner you can do something like far FP (hit) xx close FP (hit) xx close FP (whiff), duck, wait for flip… then follow up with j.SP x infinity (crossup with j.SK with 2P Sagat). the standing FPs can be timed so that the opponent gets hit regardless of how they flip.
i’m actually looking for a more reliable setup, but that’s the one i’m using atm.
for the midscreen fireball game, i’d recommend picking up HF Ryu or ST Old Ryu for a while. A2 Ryu or A3 A-Ryu would work too, but not as well because of all the counterhits supers alpha counters Valle CCs VCs etc.
but yea… it’s just ye old style midscreen “am i throwing a fireball or not?” game. if you don’t and they guess wrong, they jump and eat DP (or far roundhouse)… if you throw one and they guess wrong, they get pushed back. so yea… you want to learn how to make them guess wrong. it’s sorta one of the fundamental subgames in SF… i’d say a good X-Ryu who can do this well could beat a V-Akuma who can’t.
hopefully someone will give more A3-specific advice tho