Good find! It's weird but you can hit NJP, EXBuff, F212 midscreen for some good damage :)
I noitced in the corner you could do 112 xx BF3EXCancel, NJP, DD3EX, B312, 112 xx DB1EX, 112 xx BF3 but all that comes out to 54% with 3 meters so it's actually worst lmao, gotta love EXBall scaling. Sadly...