1. Use Manpur byepass, or else go via GAYA. Manpur is an insignificant station on the outskirts of GAYA and you need to reverse at Manpur anyhow.
2. Check your TT, PNBE will require a 10 mins halt, check halt timings at PPTA.
3. Terminate at BCY rather than BUI, it will be a good alternative to 13329 and 13307.