Ok. I got it now.
(corner) F11~trait~flying12MC, land, F13 32 MC MB~trait~2D3. 54% one bar
- works on everyone. The problem is the timing is kinda tight. The way I remember it, is if you're at the F13 32 portion of the juggle, and the opponent is at face height during it, then the rest of the combo will connect. BUT if you're at the F13 32 portion of the juggle and the opponent is at shoulder height or below then it won't connect and you should switch the ender to 1D3. It's only a 1% change so do what you feel is easier.
Also........
(corner) F11~trait~flying 12 MC MB, land, 32 MC MB~trait~2D3. 58% two bars.
- works on everyone. But again, the timing is tight. After you land from the MC MB, the 32 is a tough link. BUT vs the big boys (DD, Bane, Grundy, Lex, and for some odd reason, Sinestro) it's WAAAAAAAY easier to connect the 32 after landing.
(corner) F11~trait~flying 12 MC MB, land, F13 MC MB~trait~2D3. 56%. two bars.
- works on everyone. Much easier vs characters other than heavies.