Hmm... so you are trying to say that barring Durontos, NOT a single SF train using the Grand Chord Route should have a Non-Stop Dhanbad - Gaya Run and NOT a Single SF train using the Main Line Route should have a Non-Stop Madhupur - Patna Run. All trains going to Mughalsarai from Asansol should stop at either Parasnath or Jasidih just because they are Pilgrimage corridors.... ;-D