Lets make a list of trains whose RSA don't make any sense at all or we can say that these trains can run with independent rakes and don't need RSA at all
1. 12927/28 DR EKNR SF Express and 12961/62 Avantika Express
2. 12479/80 Suryanagari Express and 22481/82 JU DEE SF Express
3. 12915/16 Ashram Express and 12461/62 Mandore Express
4....
more... 12639/40 Brindavan Express and 12675/76 Kovai Express
5. 12817/18/73/74 Jharkhand Swarna Jayanti Express with 12811/12 HTE LTT SF Express and 12835/36 HTE YPR SF Express
6. 19309/10 Shanti Express and 19329/30 Veer Bhumi Chittorgarh Express
7. 12397/98 Mahabodhi Express and 12389/90 GAYA MAS SF Express
8. 16303/04 Vanchinad Express and 16305/06 ERS CAN Intercity Express.
9. 13105/06 SDAH BUI Express and 13185/86 Ganga Sagar Express