for mumbai NCJ CSTM there 4 days via ED and 2 day via RU. for delhi 2 days thiru 2 days MDU DDN 2 days TNSK 2 slips to SVDK there but problem is all dont have uniform route or halt pattern to reley upon. IR should consider TEN SC daily apart from that one Kolkatta daily from TEN or TN will give necessary connection.