I just wanna mention that Ji1 is a good tool to use for this as well. It's got more of a cross up friendly hitbox than Ji2, more able to hit opponents if they happen to walk in a certain direction, and produces higher damage output as opposed to starting with a Ji3 (of course, it does lack the range and disjointed hitbox).
Also, I was going to keep this a secret until I made a new video, but I found a stronger combo off of B1U2 that ends with 23:
B1U2, F3, D2, Ji3, 323, 23 = 30%