बिहार संपर्क क्रांति : मिथिला पेंटिंग की सुंदरता और तेज रफ्तार - Keshav Singh

Sections this train gets significant patronage on:
MDU/TPJ/VRI to NZM/BPL/JHS
MDU to MS/TBM
Stations that have a dedicated RL quota: MS, BZA, BPL
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Now...
more...

here begins the tip:
Bookings on MDU-MS are so high and MDU-BZA so low that on charting the MDU-MS seats are confirmed not only against the RL quota seats of MS but also on the RL quota seats of BZA. Which effectively means that the latter remain vacant between MS and BZA.
In simple words, book any waitlist between MS - BZA and chances of confirmation are extremely high. Booking MDU-MS or MDU-BZA gives nearly identical confirmation chances. Chances of confirmation for any waitlist on JHS-NZM are also very high.