one adventurous idea....
Take HWH-SSPN till DHNE....Kongu usually arrives late..assuming HWH-SSPN arrives early....book in 12648 from DHNE to CBE will confirm..HWH-SSPN is for sure confirm....if u miss at dhne catch some trian to SBC from SSPn...catch SBC-ERS intercity.....in any case ull reach by 13:00hrs.....it epends wheteher u can take risk at DHNE...