My findings:
1. GHY-SBC Kaziranga dont have any RSA, not even in-between them, as all 3 run dedicated different rake!! Eg, Su Rake covers the run & return GHY on Sa & re-depart on Su from GHY!!
2. GHY-MS dont have any RSA, as the Rake coming @ night departs next to next morning!!
3. 12516 (TVC) & 12514 (SC) do have RSA,...
more... as they simply interchange.
GHY (We)-->TVC-->GHY (We)<-->GHY (Th)-->SC-->GHY (Tu)<-->GHY (We)-->TVC-->GHY (We)
4. GHY-OKHA RSA with GHY-LTT Weekly
5. 12508 & 15640 may have RSA, as their schedule fit for the same!!
Rake would have been used from some train (earlier i tght so, but it lead into just guessing, nothing concrete), but not these ones, as u need ake available @ GHY on Wed!!
PS: The info provided is for rectification, as seems RSA info on each train page is messed up, with just GHY-MS Info intact, courtesy Mr. Venkat!!