One solution to all these demands
1. TN SK and Tirukkal shoud be combined and made a daily train from Kanyakumari. Give separate rake to Madurai Chennai exp and make it triweekly.
2....
more... Extend Tiruchirapalli Howarh to Kanyakumari and make it into a daily train. Kanyakumari HWH will be maintained during night while Tirukkal/TNSK during day at NGL one pitline is required.
3. give separate rake to NGL KCG and an extra rake and make it into 4 days a week via Madurai Trichy change arrival timings at KCG at arrive at 900 by speeding up.