Retirements have changed the profile and size of trainer Tracey Bartley's stable, leaving unbeaten Magna Amica to fill a void at Warwick Farm on Wednesday.

Gone but not forgotten from his Wyong base are Sniper's Bullet and the Group One winner's half-sister General's Sniper.

They will be sorely missed by a stable which is down to 12 horses but Bartley has hopes Magna Amica can continue the rejuvenation process in the Warwick Farm Handicap (1300m) on Wednesday.

"She doesn't carry a lot of weight and I'd like her to be a hundred kilos heavier but she is an athletic horse," Bartley said.

It's what you can't see that Bartley says will help the mare make it as a racehorse.

"She's got a will to win, I think, and we're hoping she can take the next step at Warwick Farm," he said.

After winning at Tamworth for Scone trainer Greg Bennett, Magna Amica made her debut for Bartley with a Hawkesbury win.

While there wasn't anything fancy about the margin, the win confirmed expectations after an eye-catching barrier trial against better-class sprinters.

The midweek meeting has an anniversary significance for trainer Anthony Cummings.

Cummings will have his work cut out springing a Group One surprise with Wordplay in the Thousand Guineas at Caulfield but his prospects seem much brighter in Sydney.

His runners include Best Of The Rest, sure to be one of the fancies in the Champion Casino Prince Plate (1600m).

At the corresponding city meeting last year, Cummings trained the winner of longest maiden race on the card at Canterbury.

Less than three weeks later, Fiveandahalfstar rewarded Cummings's willingness to think beyond a natural progression of races when he won the Victoria Derby.

Best Of The Rest isn't a Derby nomination but he is shaping as if he is looking for the distance of Wednesday's race.

A three-year-old, Best Of The Rest has run on over 1200m and 1400m at his two starts since a juvenile season which included promising returns against against well-performed horses such as Barbed and Bound For Earth.