Cooper actually sums up the campaign fought by 1 Fighter Wing as a success, and I'd agree with that.
"In the end, they [the Japanese] could no longer afford to continue their campaign over Australia, because the defence was too strong, and their losses would not be worth the limited results. The air defence of Darwin in 1942-43 therefore can be considered a successful campaign for the RAAF, but the victory was one of superior Allied logistical depth rather than one of outright victory in battle. But this was typical of all successful air campaigns in World Wat II - over time, the better organised and better resourced side always prevailed, without exemption, and irrespective of kill ratios.
The RAF's Desert Air Force emphatically proved this point over North Africa in 1941-43: the Luftwaffe fighters consistently out-scored the RAF fighter squadrons in this campaign, but nonetheless failed to apply air power effectively and so lost the air battle. Certainly, an air campaign could never be won in the Japanese fashion: by an interrupted program of on-again off-again raids, and the merely sporadic if sometimes sharp losses that these occasioned."
Cheers
Steve