I disagree about Fraser coming off the bench. That is keeping one of our better (or more needed) players out of the side altogether, eg, one of Hooper, LSL (Lukhan Salakaia-Loto) (Lukhan Salakaia-Loto) or Williams, assuming Skelton will be in the team.
In case Fraser does start, then my comment would apply equally to Tizzano. One No 7 in the 23 is enough with Hooper able to fill the 7 spot in case of emergency.
Really need to go back as much as possible to the strategy used and as much of the side that played the last game against the Lions and won and played well in South Africa. We had a young, super fit, energetic bench that brought up the tempo and in all three games the Wallabies came back from many points down at half time. By all means Slips, Pollard, AAA (combo of Slips and AAA tried and true) Frost and Skelton starting, back row of Valetini, McReight and Wilson. Then also Loneghan and Lynagh/Edmed to start - and or the rest of starting backs - bring the fitness, energy and smarts - consider starting an Ikitau/Flook pairing for superb skills and rugby IQ, putting JAS and Daugunu on Wing with Jorgo as 15. Then the bench of BPA, Bell, Nonggorr, Hooper, Lukhan/Williams, Kalani Thomas (instead of injured Tate,) JOC (James O'Connor) (older but great finisher), and Toole. The energy that the bench brought for the previous games was just not there last week. Hooper is playing brilliantly - but he absolutely smashes the opposition as a finisher and I think it was a key factor in the wins. With the combo of Bell, BPK and Nonggorr, scrums were strong against the Boks. Nonggorr's constant work in breakdown and his tackle rate allows the others like Bell and Hooper to carry hard and fast. Kalani has that Tate zippiness and intense competitiveness. Williams always finished with an energy effort that included lineout steals and winning turnovers. That would have to be weighed against Luhkan's physicality and presence to smash the opposition when they are tired. JOC (James O'Connor)'s maturity stabilised the ship and he seems to be great at those finishing minutes. Toole's pace coming on a the end would burn any wing opposition.