This guide has helped me a good bit. One thing I have issue with is you say some of the combos you've listed are true combos, however in training I've yet to land a Dthrow->Uair->knee and have it register a 3 on the counter. Is that not the criteria for what you call a true combo, or am I just not doing it fast enough? Or perhaps I'm doing it against characters who are too fast and they recover before it would actually register. I also wanted to throw my 2 cents in on some combos.
COMBOS
Dair->Knee can be hit as low as 60% depending on your opponent.
Dair->Utilt->Dash->Uair Is a good way to mix it up as well.
Dair in general is a good combo starter, but the opponent doesn't really start to get launched until around 60%.
As for dair, I have been experimenting more with this move but my main concern is that it's incredibly easy to tech, and if they tech in place the move has so much landing lag that they basically get a free punish. Against characters like Diddy, youre gonna eat a free 30-40 percent or even a stock if you're high in percent. Its just not worth it.
All that being said though, you get sick style points for landing uair -> stomp -> utilt -> knee. It requires two failed techs but you look freaking awesome