How about running Mewar Express with Push Pull technology, with WAP-7 in front and WDP-4D at back? UDZ-COR is electrified section so WAP-7 will take charge and COR-KOTA is non electrified so WDP-4D will be used. Then again, from KOTA to NZM WAP-7 will be used while WDP-4D may be de linked or turned off.