I just had a look at the schedule of this train and I felt that a Direct Superfast Train between Guwahati and New Delhi is required via Gaya .... :-0
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PS: It can stop at Kanpur Central, Allahabad Jn, Mughalsarai Jn, Gaya Jn, Kiul Jn, Jamalpur Jn, Bhagalpur Jn, Sahebganj Jn, Barharwa Jn, Malda Town Jn, Kishanganj, New Jalpaiguri Jn, New Bongaigaon, Rangiya Jn and Kamakhya Jn. So a total of 15 Stoppages ... :-)