
Waller said he remains undecided on which race Patrick Erin will contest next but suggested the 3200m of the Group I Melbourne Cup would suit.
"Not sure. Might look at something bigger. The St Leger here in two weeks and obviously you've got the Cups in Melbourne," Waller said.
"Two miles is really going to suit him to hit his peak.
"I can just see him improving. He's a tough horse. Keeping him fresh."
Patrick Erin joined the Waller stable earlier this year after coming across from New Zealand and was sixth in the Group I ATC Sydney Cup in the autumn.
He has the overall record of 11 wins and eight placings from 27 starts with earnings in excess of $660,000.
Not offered at auction, Patrick Erin is a sibling to stakes-placed Gallant Boy and Beijing Boy being from the good producer Mega Babe, who has had six foals to race and all are winners.
Patrick Erin is the best of five stakes-winners from Montjeu's Group II winning son Gallant Guru.