Friend, stops appear good for the long distance S/F with 65kmph avg speed however RIG may be given stop.
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Although there is only one weekly train (MUM-Kamakhya) connecting the region with north east. The sufficient traffic for a daily 22 LHB coach train is doubtful from the NGP-ROU section. I feel frequency should be reduced to biweekly.
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A...
more... combo of Direct and Daily connectivity for NGP-DBRG/GHY connectivity can be given if the train runs (sharing DBRG/NGP time slot) with different destinations like:
DBRG/GHY-NGP weekly/biweekly
DBRG/GHY-NGP-Pune/KOP/Goa biweekly
DBRG/GHY-NGP-LTT/Goa(via Panvel) biweekly
DBRG/GHY-NGP-SC weekly/biweekly