ಮೈಸೂರು - ವಾರಣಾಸಿ ಎಕ್ಸ್‌ಪ್ರೆಸ್: ಕಾವೇರಿ ಮತ್ತು ಗಂಗಾ ನದಿಗಳ ಸಂಪರ್ಕ ಸೇತುವೆ - Vishwanath Joshi

I need to reach Delhi on a Thursday (1 June) and have a night bus to board from there at 9 PM. Would be travelling from Kolkata. Can anyone suggest any good link that also takes into account possible delays etc.? Departure from Kolkata is preferred to be after 5:30 PM.

Few options that I have thought -
1. HWH - GMO...
more...

in Chambal Express, GMO - NDLS in Nandankanan Express - Cons - Both trains have too close arrival timings in GMO.
2. HWH - NDLS Rajdhani Express, though I can manage to prepone the departure by 30 mins for the sake of Rajdhani Express, but then, would have to spend close to 10 hours in Delhi, which I don't want to.
3. HWH - KGP by local, HIJLI - NDLS by Odisha Sampark Kranti Exp - cons - It reached Delhi at 7:35 PM - if it delays by more than 1.5 hours (which is very likely), I'd miss the bus.

Any help would be much appreciated, thanks!