arey bhai,Patna-Kolkata ke beech toh dher trains hai..Aap jis SF ki baat kar rahe ho,usko Delhi tak khich ke le jao..Ek dedicated Daily SF with lesser halts toh honi hi chahiye MDP/JSME-Delhi ke beech.
Stoppages limited hi honi chahiye..After Patna,only MGS,ALD and CNB ya phir Non-Stop hi kar do kyuki MDP/JSME se hi full hokar aayegi.