On this route only passengers and NGP-BSL ICE have <18 coaches. So it means except these every train requires bankers in MJY-DQH and TEO-CCD
BTW last year I was travelling in Dakshin from ET to BZU...LGD WAP-7 was hauling it through the ghats without any bankers....Suddenly rain poured down and the beast P-7 failed to pull the train further......Train was stranded in ghats for 20-30 minutes before twin AJNI WAG-9 came to rescue......Is this what is called as 'wheel slip'?