Over the past few years, Chris Waller has risen through the ranks to become a leading Group One trainer and multiple Sydney premiership winner.

It has taken a lot of hard work and while having glamour horses like Zoustar helps, it is the next tier of horses who have built his stable and still form the backbone of his success.

Seven of those horses - Coup Ay Tee, Bagman, Tromso, Tougher Than Ever, Hoylonny and Said Com - are down to run in Saturday's Octagonal Handicap (1400m) at Rosehill.

With Masthead taken out to instead go up a level to the QTC Cup at Eagle Farm, Waller is reluctant to split his other runners, preferring to wait and see what they can do.

The seven horses have amassed around a combined $3 million prize money.

"These horses have been very good to us," Waller said.

"They are reaching the twilight of their careers and regrettably have to run together.

"But due to them being so good to me and their connections they need to be given their chances.

"They not going to win out of turn but if they all win a race this preparation they've paid for themselves for a year but continue to give their owners a lot of satisfaction.

"Almost all owners in Sydney want a competitive Saturday horse.

"Winning Group races is extra. Winning Group One races is the elite.

"If you've got a horse going around winning good prize money it's still a lot of fun."

Waller's numbers in the race could be reduced to six with Said Com uncertain because of his wide barrier.

Despite his strong representation, it is Sydney's other two big stables which punters are looking to for the winner with Darley's Haussman edging the Gai Waterhouse-trained Queenstown for favouritism.

Haussman was narrowly beaten at Scone by one of his Saturday rivals, Mighty Lucky, while Queenstown has been a star track worker at Randwick ahead of her first start since her third in the Group Two Zipping Stakes in November.

"She is thriving," Waterhouse said.

"Her work has been excellent and she is forward enough to run well first-up."