Like How we have Rajdhani Gang from MGS to NDLS section, there should be a LHB gang from ALD to NDLS section. This is to maintain the prestige of the LHB trains. These 5 trains must run 1 behind the other and must reach NDLS near around together like how Rajdhani arrives!
By this, they will get speed upgradation also. Here are the timings I am proposing. Please dont be too literal about the other train timings if coinciding with list. I just wanted to know about this idea... (NOTE: I have adjusted the timings of these trains):
Regular...
more...

ICF trains:
Bihar SK: CNB depart: 22:55 hrs
NDLS arrive: 05:35 hrs
Gorakhdham: CNB depart: 23:10 hrs
NDLS arrive: 05:50 hrs
ShramShakti: CNB depart: 23:25 hrs
NDLS arrive: 06:00 hrs
Vaishali: CNB depart: 23:30 hrs
NDLS arrive: 06:10 hrs
Regular "LHB Gang" :
Purushottam: GAYA dept: 15:20 hrs
MGS depart: 18:40 hrs
ALD depart: 21:00 hrs
CNB depart: 23:40 hrs
NDLS arrive: 06:35 hrs
Mahabodhi: GAYA dept: 15:30 hrs
MGS depart: 18:55 hrs
ALD depart: 21:20 hrs
CNB depart: 23:55 hrs
NDLS arrive: 06:45 hrs
Poorva via Patna: PNBE dept: 16:00 hrs
MGS depart: 19:20 hrs
ALD depart: 21:40 hrs
CNB depart: 00:10 hrs
NDLS arrive: 07:00 hrs
Poorva via GAYA dept: 14:30 hrs
MGS depart: 17:40 hrs
ALD depart: 21:40 hrs
CNB depart: 00:10 hrs
NDLS arrive: 07:00 hrs
Shiv Ganga Manduadih dept: 19:00hrs
ALD depart: 22:00 hrs
CNB depart: 00:30 hrs
NDLS arrive: 07:10 hrs
Sampoorna Kranti: PNBE dept: 16:50 hrs
MGS depart: 20:10 hrs
ALD depart: 22:20 hrs (No Stop, passing time)
CNB depart: 00:40 hrs (Technical Stop)
NDLS arrive: 07:20 hrs
Note: Sampoorna Kranti is kept at last as if some day, any other train is late from origin itself, SK without any stoppages can be given that slot and hence can arrive NDLS before time also. (Deciding factor will be MGS, as it may reach MGS before time, it can depart beforetime also on that particular day).