Just a proposal. Why don't this garib rath be extended to VSKP via KUR,BAM,VZM. Yes it would be bit circular route. 227 km excess as compared to 13351 crawler. But people never get confirmed ticket in 13351 as its the only train from dhanbad.
This train presently takes 16.15hr , but if speeded up a bit i.e made to arrive BBS within 15.30 hrs, plus BBS to VSKP, further 6.30 hrs, then total journey from DHN to VSKP would be nearly 22hrs which is equal to 13351. But people will definetly opt for this train instead of 13351, all thanks to good departure timings from DHN.