There's tons of things I want to reply to so I'll try to be short with each of them.
Ve: No j.2C > dash > 2B in the 7.2k. Dash 6A is easy, dash 6B is easy, j.2C 2B is easy. I guess it's the dash I'm having trouble with.
Silfer, thanks a ton. I'm not sure if it'll help but thanks for trying. I will try disecting it more, and using 2B CH will be a good place to start. I'm using the 360 pad right now, I usually use d-pads for fighters happily but it turns out the 360's pad sucks ass for half-circles so I need to use the analog. I love the look of the new pad but it's overpriced to shit. And I got 632B146C on my absolute first try, and could pull it off 100% within about 10-15 minutes. Apparently something about j.2C 66~2B just hates me.
Cor, that might help, thanks, I'll give it a try.
Zero, Challenge 10, I'm going through the challenges before I go off on my own to find bnbs I like. One of the earlier challenges had this link but I think I got away on a fluke. That or the earlier part of the combo was easy enough to get more ideal positioning on the j.2C.
Solar, I've been trying to do the 2B the INSTANT the dash begins, I haven't even been waiting for the dash because every time I do the 2B is too late (in fact it's usually late even when I don't wait for the dash). And yeah, I'm sorry for shooting down your attempts to help, but I was pissed off, in pain, and needed to vent. Also lol 90% humidity. And the whole gb2tager thing hit a nerve, the debate about whether fighting games are about strategy and reflexes or huge combos and setups is a really soft spot for me, so I apologize.
TD, don't have to apologize, you're being damn nicer than I'd expect anyone to be to me here. I dunno about your craz-uh, interesting daydream idea, but thank you regardless. :b
New day, wrist not in pain. Time to nail this fucker.
EDIT: Okay yeah it's fucking easy with the d-pad. God damnit. If only that new controller wasn't $100 here. :/
EDIT2: Okay so here's what was happening. 633B, or 63B. That's why the dash was so rarely coming out at all. I have to focus really hard on making sure the second 6 is, well, a 6. I can see why you all said it's so easy, 63B is just a really easy mistake to make on an analog and not easy to make on a d-pad, probably not on a stick either. Combined with being new with both analogs and with mid-combo dashing with a non-step-dasher, yeah, bad, bad combination.
My pad also seems to be more sensitive to up/down than it is left/right, I've noticed this before with how easy it is to accidently jump during half circles. Might try adjusting the axis ratio thingy.
I guess that's what I get for practicing in Challenge mode instead of Training mode. Lesson learned.
Anyway thanks everyone for your help, sorry for complaining/raging/etc, and maybe you could add this to list of possible causes for screwing it up in the FAQ.