I will sir rather opine slightly...
Change the Tag to Rajdhani with no change in stoppages and T.No.
Only Slot sharing with 22221/22 with change in Source to CSMT in lieu of LTT. So in short timing will be
22109
CSMT...
more... 16:10
NZM 10:05
22110
NZM 17:15
CSMT 11:50
So BSL and GWL ppl will be able to enjoy Rajdhani service to Mumbai/Delhi