If this is going to be a 24 coacher then maintenance has to be in Delhi as 23 is the max Tuticorin pitline + sick line can handle. If the arrival at MS by 5:30 is an issue then it has to be slowed down to come at 06:05 hrs arrival in the weeklies/Biweekly slot. Better to speed it up to come as the first train to MS else 06:10 is the only nearest time which is being used by the TEN Premium special.
Further opinions guess would be interesting.