I play Heihachi almost exclusively and I am 99% sure I found a way to combo into his level 1 within a few minutes in training mode. Air dash into neutral square 2 hits and super. This counts as a combo in the attack data or whatever, I've never missed it online against other players, and I've never found a way to get the AI to avoid it. Works great and easily hits multiple people.
Woah, seriously? That's awesome man, I've gotta test that. : D
If I haven't mentioned Trivio in my post, it's because she is so beautiful and precarious that I just wanted to show her how much she means to me.