So far, my main BNB is:
J.1 > B.1, 2, 1 > F.Dash > F.3, 2, Nomad Dash > F.3, 2, Hooksword Tornado
EDIT: I believe this does about 36% damage mid-screen with no meter.
...has anybody else noticed that Kabal's X-Ray gets raped by damage scaling when put into combos? Seems pretty ridiculous to me. Also, some of the damage scaling just plain doesn't make sense. If I incorporate Kabal's X-Ray into that BNB early on into the combo, it actually does MORE damage than if I were to tag it on at the end. More hits = less damage? WTF?