When Durgiana Exp was not introduced then Akal Takht Exp was the Queen SF on the Calcutta - Sultanpur - Saharanpur - Amritsar Route. I loved to see the train's Non-Stop Run between Varanasi & Lucknow so after some months when SLN was added to the stoppage list, I didn't like it. It was only after interacting with Harsh & Arif Sir on IRI that I realized the importance of SLN Jn on the BSB-LKO Route via Jaunpur. By now even I feel that SLN can be given to Gurumukhi Exp but Parasnath Stn for Durgiana Exp is really too much to arm twist a Superfast >:-(