Chris Waller expects Delectation and Kermadec to confirm their promise at some stage of the autumn carnival but he won't be surprised if they are overshadowed in their return to racing at Rosehill.

After successful spring campaigns, Delectation and Kermadec resume against stablemate Harrier Jet in Saturday's Eskimo Prince Stakes.

And it is Harrier Jet who is shaping as the stable's tip despite the three-year-old campaigning in lesser-grade races during the summer.

"All three are nice horses but one of them is rock-hard fit and that's Harrier Jet," Waller said.

Harrier Jet has been costly since a first-up win at Rosehill in November but he has still managed three placings and Waller figures a return to 1200m will help his cause.

"He's dropping back in distance and a horse like him at this time of the year can often surprise if they have got ability."

Waller is finalising autumn plans for Delectation and Kermadec with a warning about their fitness as they step out for the first time since the first day of the Melbourne Cup carnival at Flemington.

"Delectation is a length below his best because he is ninety-five per cent fit," Waller said.

"And Kermadec is probably two lengths below his best because he's also only nine-five per cent fit and he's racing over a short distance.

"Give him another couple of runs and he'll be ready to take on good horses in a Guineas race."

Waller admits Delectation has tested the stable despite three wins and a Group One second at long odds behind stablemate Brazen Beau in the Coolmore Stud Stakes.

Delectation has been at his best over 1200m despite looking like a horse which should extend his distance range to 1600m.

"I'd love to send him out to a mile but I have to be careful in doing so," Waller said. "Saturday will tell us a lot about how he settles.

"We've had to pull him right back to switch him off but he's been well looked after so a horse like him should come into his own in the autumn."