The stable has 12 runners tomorrow, a huge number for them this early in the spring, with Major Perry and Montana D J other winning hopes.
"Major Perry is really well and working like he can win so he is our best hope of the night alongside Merlin," says Purdon.
Son Of Patrick (R8, No 6) returns from an Australian campaign but is expected to need a run in a good field headlined by Temporale, who isn't that badly off starting from 45m behind with plenty of his rivals also facing handicaps.
Purdon and Phelan also have two juvenile trotters making their debuts in Halberg and Southern Diamond (race three).
While they have plenty of time for juvenile pacing fillies Advance Party and Lightning Baby (race five), they meet race-hardened and classy rivals in Kahlua Flybye and Forever Me.
The night's other highlight will be Old Town Road trying to overcome a 30m handicap in the main pace, which he is at short odds to do.