Yes LKO-PPTA/PNBE will be very good.
BPL-LKO Distance is easily coverable in a single day for return trip, but the train has to be given the top priority, BPL-JHS section can support 130 kmph, the time taking section is JHS-CNB but if priority has been set right, then the entire BPL-LKO/LJN section is coverable in 8 hours (at current infrastructure). It can be improved after JHS-CNB doubling and CNB-LKO track upgradation completion