I guess saying 1 drive and 0 meter might have been slightly off. Hwa CAN indeed get over 850 starting from a D shoryu at the cost of only 80% drive (still a decent amount less than an HD combo costs) and 0 meter (I don't know of any meterless HD combos that deal over 850 damage), and it's really very practical (I have done it in actual matches many times before), but not as practical as some other options.
For starting a combo with 50% drive + 1 meter Hwa can get up to 712 starting from shoryu while drunk. Still quite good. That's dp+D, [DC] qcb+D, qcb+D, qcb+Bx3, EXDM. Works from about 4/5ths of the way to the corner. So if you have someone trying to zone you while you're about 1/2 screen away and they're nearly cornered, you can get them with 712 for very little effort.
From anywhere (even if Hwa is cornered) you can get 648 damage starting from D shoryu. This requires 50% drive and at least 1.1 meter while drunk. This is dp+D, [DC] qcb+Bx4, EXDM.
That's basically what you should most often do after D shoryu.
How do you do that 850 damage? Because if I do D SRK midscreen I can DC B Dragon Tail and can't follow up with much else except B Dragon tail until I have them in the corner, B SRK, cancel into D Dragon tail and Super.
dp+D, [DC] qcb+Bx4, dp+B, [DC] qcb+D, qcb+D, qcb+Bx3, EXDM is 824 and you gain back 1.9 stock for the combo, works literally from anywhere. So if you started that combo with just 0.1 stock you could finish with EXDM.
dp+D, [DC] qcb+D, qcb+D, qcb+Bx3, dp+B, [DC] qcb+D, qcb+D, qcb+Bx3, EXDM deals 855 and builds up 2.2 stock. You build more than it even costs. This is pretty do-able in real matches actually. When you have somebody cornered, you can pressure with far D and far B into d/f+B, and if they try to do anything to get out of the corner, hit them with that D shoryu. It's got LOADS of invulnerable frames, so you can use it to go through some ridiculous stuff, like Goro's dp+D or most other reversals.I have some frame data for console Hwa, but just to confirm what frames count as the end/start?
For example opponent blocks a D Dragon Tail (2 hits), using the 1-guard-jump technique I can count (60fps) 2 minus frames then on the 3rd frame Hwa can do something (block/dp etc).
Is that minus 2 frames recovery or 3 for that move? Thx. At the moment I'm assuming it's minus 2 frames since the 3rd frame he is able to do something.
As for this, it seems that the drunk D dragon tail is 3 hits vs standing opponents. It's quite hard to test this against the training dummy since it seems that they like to low block D dragon tail if you set them to all-guard. It only works at certain ranges, but I'm pretty sure that close C, d/f+B, qcb+D gets you 3 hits midscreen, and qcb+D will always be 3 hits in the corner if they're standing. It's tight but you can indeed do close C after qcb+D and keep them in blockstun if the dummy is set to 1 guard-jump.
And the moral is... don't put Hwa on first, keep him drunk at all times and he's probably the single scariest character in the whole game.
EDIT: To add on to this massive post, dp+D, [DC] qcb+D, qcb+D, qcb+Bx3, dp+B, [DC] qcb+D, qcb+D, qcb+Bx3, dp+B deals 691 and causes 96 (!!!) stun, so there's a very high chance that you'll stun your opponent during this combo, turning it into a potential death combo.
tl;dr: Just read the bolded section if you want to know how to get 855 damage from an invulnerable shoryu.