Reach Dhanbad early, take general ticket by 3:30PM, reach PF 2 by 15:45. the trick i used in this train was, each of three reserved coaches has seating capacity of 108, but reserved seats are only till seat No. 90. from 91 to 108, seats are unreserved. take window seat between 91 to 108 and enjoy journey. In reserved coaches, very less people board so congestion is also less than unreserved coach.