If SWR takes over Udyan, it can reach Bangalore by 0530 cool. Then for avoiding rake idling at Mumbai, they can have RSA with current DR UBL with slight tweak of both trains.
Something like SBC DEP 2230; SUR 1030 CSTM 1815. Return: CSTM DEP 2100, UBL 1000, SBC 1730.
Another rake SBC DEP 0900, UBL 1615, CSTM 0530.
Return: CSTM DEP...
more... 0830, SUR 1630, SBC 0530.
By this way, we can get 2 good trains one in the morning and another in evening from both ends.