So I've tested this combo on all of the characters except for Dampierre, Devil Jin and the mimics. I've noted that this combo seemed to work on all of them except for Leixia, Astaroth, Algol, Xiba, Natsu and Aeon. In particular, if I use 44B+KA+B+K on Leixia after 2x 1B:B, I sometimes couldn't connect to 2143B:B; it's always fine without 44B+KA+B+K though. Astaroth and Algol got pushed back rather often, and while I could always connect to 2143B:B, I usually could only continue the combo through :A+B+K instead of ~JFT although ~JFT was doable if they were not pushed back. Xiba, Natsu and Aeon on the other hand, almost always got pushed back, but unlike Astaroth and Algol, I could rarely connect to 2143B:B.
What a relieve! I thought I just suck as alpha Patroklos before testing this combo against characters other than Aeon.