The ultamate A320 fuel saving method.
Tow out to TO runway threshold - GPU + GTSU for starting both eng - packs off TO - TOGA to 3000' - cleanup - green dot climb - Crz and Desc CI '0' - green dot desc from 10000' - Conf 1 at GS int 3000' - 2 at 2000' - 3 at 1000' - gear down at 500' - idle rev only on ldg - shut down engines on runway - tow in to bay.
No APU, no clb/desc level-offs, only 1 pack on, no galley power, no TAI.