I'm finding B3, RC, F3~EX DF2, NJP, 4~BF3 = 29% and B3, EX DF2, NJP, F2,2,1+3~DB2 =30% to be his best options after a MAX RANGE B3. But I'm finding it difficult to land the F2,2,1+3 consistently, so I've just been ending the combo in F2,2~DB2 for 29% I think it's worth the 1% dmg loss to consistently land the combo.
The B1 after a B3 will whiff if the B3 connects at max range, but works really well when closer.
You can also do B3, RC, F3,1~EX DF2, NJP, F3~DF2/BF3 = 29%
Whatever floats your boat I guess ;p