If you want to go to any station between KTE & Itarsi from Satna at afternoon time then the best train is for you is 51768. Because It becomes KTE-ET fast pass after katni. These two traina share their rakes. First You board from Satna to Katni then most of the passengers detrained. After that you got a very good space to sit & after Katni this train run like express in passenger fare.
So it is the best way to save money, time & energy.