This might be useful vs characters where you can flip their inputs. Granted they can just delay wakeup, but Mileena has F1 and stuff to deal with it, so yeah. Are there more damaging combos you can end this with?
Not completely identical, but similar:
Starter > b34 air sai > slight walk forward f2~vanish. Only thing is this version will cross up less consistently if the timing isn't right, but in return it does more damage. The fact that it doesn't always cross up could actually be a benefit though if you think about it.
I'll look for some more combos using OP's original b3 ender
EDIT: On second thought, I'm new at this but wouldn't 21u4 as a combo ender give enough advantage that we could crossup vanish anyway? Never hurts to have another option for mind games and style though so thanks for sharing! Especially since the other things I've tested do not provide the non-ex fade as a crossup option