It has been so long since i played MKA...But i will post my Favorite Scorpion P/C 58% Combo. *Checks discovery*
Make sure you face the camera or the first b+1 will whiff, Then in Hapkido press (up+4,b+1,pc,2,2,3,pc,b+1,cs,pc,2,2,1).
Here is the vid for it :)