off of slide (j.D/5K CH) or Gamma blade and any place where you're going to 5S 5H iad, to go into BnB on faust, instead of running up 5S > 5H > iad XX do 5K > 5H > iad and it should work
^
this also helps on axl and a few others i cant remember off the top of my head
another thing to note is that his hitbox is very wide and you can combo into 41236K~D easier and further away than on most chars while often continuing the combo