The problem is, it can reach MAS at 21:15 before Shatabdi, but when to depart ?. It needs to depart after 22:00 TN departs. It might be around 22:15. At the same time there is SF group which starts at 22:30 from MS. They have aggressive run till BZA. Even though it starts at 22:15 making it 7:30 hrs, it reaches BZA at 5:45 am and again problem will be there in departure at BZA. 6:05, 6:40, 6:55, 7:05 -> all these SF/express need to OT which will gain make its arrival at VSKP at 15 hrs. So there is no use for this train to reach early at MAS. Also this stays in MAS for 65 mins in return direction. But they can remove the slack at VSKP arrival making it 14:25 and dep 14:45.