So I've been messing around with naked F3 and managed to get this.
F3, B2 xx DB3(mb), B23, U1+3
Does 36% damage, unfortunately that's 2 bars if you want to meter burn the F3 so I'm not sure how useful it will be. Also, sorry if the notation is off, if someone notices let me know and I'll fix it.
Also, I've noticed that if you watch their height when you land the 11 after the B23, if their a little low when you hit them with black magic it's best to use 11 xx DF1 to end the combo (you can usually meter burn it for some good damage) since B23 can have a tendency to whiff on the uppercut if they're too low.
The timing for 11 after B23 is also making me want to blow my brains out. I'm getting it more consistent, but does anyone have any tips. The best I can come up with is to use the 11 as they fall to about Adam's head height, but that might not work in an online situation with lag. A two count seems kind of close, but I don't know how spot on that is.