If you do this in the corner, and need a way to get in/mix up, start with a close hop into your opponent, jump in with a light punch, then land on the ground and do a fierce punch cancel into CD (which should get you a 3 hit combo if done right), then finish off with hcb+d, d, f b f+ p and combo the rest. With the right timing, (because if you don’t time it correctly you can miss a few hits in the last f b f punch) you can easily get 354 damage. It should be a 20 hit combo.
You have to jump in with a short hop/hop, it can’t be a super jump/normal jump/dashing jump from mid screen or beyond because the light punch will not link with the fierce punch. Optimally you would be applying pressure to a person in the corner, and mix up with a hop light punch to begin the combo.
If your timing is off, you can still get about 320 damage (with 19-20 hits) or 299 (with 18 hits), but seeing as for most characters 354 damage without needing to use a custom combo or supers is pretty decent.
Oh yeah, I love Ryo and will likely be maining him in one of my teams. Raiden is also another great contender.