I suggest a Mayiladuthurai to Bangalore train via Villupuram, Tiruvannamalai, Katpadi. Can be a ONT or ICE. Distance can be covered in 10 hours (512 kms), fully electric engine with one loco reversal at KPD. As of now there are two trains one ONT express via Salem, Trichy and passenger via Salem,. Vriddhachalam. Both have loco reversals.
SR can run this train with PM at Trichy or Villupuram.
Views sought.