Himeno, I posted above how QF37 (1725 hours MEL - SIN) was meant to be departing an hour late on Sunday 19 November 2017: this became 80 minutes delayed. SIN arrival is suggested as 2325 hours, an hour late. Assuming this aircraft forms QF38, it's hard to see you departing at 0020 hours because typical turnaround for an A332 or A333 is 75 minutes or greater, so I surmise that 0040 may be the best for which you can pray. By quick back-of-the-envelope reckoning (which won't be exact as winds and taxiing times among other factors vary daily), that might put you at teh gate in MEL tomorrow (Monday 20 November) at 1150 hours, or later.
You should be able to make a connection to QF812, the 1315 hours MEL - CBR. Do you find in these situations that any checked in luggage tends to arrive at your ultimate destination at the same time as you, or is it typically delivered by courier (in tomorrow's case) that evening to your home or office, having been 'uplifted' on a later QF MEL - CBR flight?
Happy to be proven incorrect, but I can't see you making QF848 that is the MEL - CBR 1200 'high noon' departure.
UPDATE: QF now claims that QF38 will depart from SIN at 0030 hours on Monday 20 November, 35 minutes late. I reckon that's a tad optimistic.