I'd just like to point out, that using B2, 4xxShatter is extremely positioning dependant, and off a position much harder to set up off our wall combo. There is also a very small window of successful positioning for SZ himself, because he needs to be standing close enough to land the B2 into 4, but not far enough that his shatter doesn't break that Clone, which can be challenging. It also wastes much more time after the knockdown making punishes / escapes much more likely. Also, the execution of the combo itself is much tighter than other options, who work even if you mistime by a couple of frames, doing it this way is much harder. It basically turns an already extremely situational combo, into something borderline a gimmick.
And literally the only thing you gain from doing it this way, is 1% damage, assuming you NAIL the timing and spacing absolutely perfectly, it allows you to manage to fit an extra D1 juggle in to the combo. Otherwise, 24xxShatter combo's are much more reliable, and do exactly the same amount of damage, set up much more reliably, safely, don't require perfect spacing from SZ himself.
However, I won't say that positioning a Clone as such is completely useless. Here is a video demonstrating an EASY as pie, 62% X-Ray combo that requires a B2, 4xxShatter start, including set up after a wall combo
Other than that, I strongly recommend just sticking to 24xxShatter video's
check Nu-Skools vid on the previous page demonstrating how smoothely it works in practice