Why do we think so?
The demand between GHY and NDLS is unlimted; the moment ARP opens the berths are booked.
So a daily AGTL Rajdhani will have guaranteed traffic to and from or up to GHY.
I have travelled in Dibrugarh Rajdhani to and from GHY and the tickets are easily available just before Charting too.
However,...
more... AGTL Rajdhani will also have a great demand between AGTL and GHY.
There will also be a great demand from SCL and KXJ on this train.
If we look at things in this way, a daily AGTL Rajdhani is certainly the right way to go.