I don't think it's that tough. Asn-Puri via Adra can be easily done within 8hrs. Kyq Ypr Ac exp covers Asansol-Khurda Road stretch in 7hr 45mins with an avg of 72kmph. Since it's a VB, it will definately have lesser halt and a bit faster TT. So the whole Asn-Puri stretch via Adra can be covered within 8hrs.
Unnecessarily diverting it via Bwn-Dkae section will increase the distance by 100kms. So that won't reduce the journey time as such