@ Mr. Aishik Ghosh.
Thanks for your suggestion, but at the present stage it may not be possible because of the following reasons:
1) LMG-GHY is a single line section and thus this train has to follow 15470, 15903/15933; overtaking is not possible;
2) 3Hrs in that section is an extreme performance shown by the Raj and JS with a limited halt; a standard...
more... Mail/Express normally covers this distance in a range of 3:30-6Hrs; thus this train easily fits in the slot, even it is faster than many other trains like PSK (15601/15602) in the same route;
3) Barak Valley was always a slower option with more stops than Cachar in the MG era, thus the trend has to be there in BG era too;
Anyway, I will keep your advice in mind and see what could be done here.