Had some to to lab it out properly so heres shang 1 bar morph into combo continuation,without kameo usage from his standard optimal bnb.
F4121xxdf1,s4xxdf1,s4xxdf1,f4xxdb1EX,dbf1,df1,Morph....
After this depending on the character you can continue,with mileena for example its 1xxroll into ender,scorpion can 1xx spear into ender.
The combo is very stric and the key is keeping hight during both s4 parts,doing them rather early and perfect input dbf1 abd df1 so they are done immidetlly when available(a bit tricky as this game has non existent buffering).