All needs LHB no secondary opinions but depending on no of rakes need i prefer Vaigai and pallavan.
DR MS and MS SA its tough as CR got many trains as of now for LHB
regarding MAS SBC mail surely SWR give but no of rakes is around 6 i guess so takes little more time same with TN and GT altogether it needs 6-8 rakes with spare so really tough
Coromendal...
more... can be done but RSA need to be broken.