Chase Auckland has drawn barrier four (after emergencies) with fellow Kiwi pacer A G's White Socks at barrier three and the three New Zealanders dominate the market.
"Chase Auckland has come through last Friday [Cambridge] really well but Self Assured would still be our best chance this Saturday," says Purdon.
Former New Zealand Cup winner Thefixer has been allowed to miss this week's race after casting a shoe in the Flying Mile and will instead target the Casey Classic on Saturday week as his lead-up to the Hunter Cup on February 1.
South Auckland pacer Triple Eight is now also set to cross the Tasman to contest those same two races.
Purdon's Victoria Derby hope Smooth Deal has an awkward draw but will still start favourite in Saturday's strongest heat of the Victoria Derby, where he meets Bad To The Bone and Line Up as well as last season's Aussie juvenile star Be Happy Mach.
They all need a top four finish to qualify for the final at Melton the following Saturday.
Purdon is now also the caretaker trainer for Stylish Memphis who contests a Victoria Oaks heat this Saturday night.
Oscar Bonavena was the only trotter from the All Stars stable to make the trip across the Tasman and races at Melton the following two Saturdays.