Waratahs will take a makeshift halves combination as they look to make a fifth straight Southern Inland grand final on Saturday.
Sam Hobbs is out with a knee injury sustained late in the Wagga side's win over Albury last week with Dan Selmes to take over as halfback.
Hobbs made an early call to miss the clash against Ag College at Conolly Rugby Complex.
However co-coach Michael Davis is confident Selmes will easily step into the role.
"He spent more than half of last year there so we're very confident he will do the job," Davis said.
Waratahs have lost their regular second grade nine, with Diego Danus returning to Chile but they were hesitant to make too many changes to their second grade team as well ahead of their clash with Ag College.
Selmes' move off the wing is just one of the many back line changes this week.
Captain Tim Corcoran returns to the side after winning the 26-17 win over the Steamers.
He's back in his regular inside centre role however Waratahs have elected to keep speedster Blake Hart at number 10.
Davis thought it worked well for the club.
"I thought he was pretty direct and we wanted to keep him there," he said.
"It benefited us a little bit in regards to directness and getting into the game."
It means Xavier Chigwidden shifts to outside centre, Joe Reynolds moves onto the wing while Callum Ramm replaces Corey Toole after his cameo appearance last week.
Despite winning their last four games, Davis hasn't been thrilled with the team's performance.
However he hopes the win over Albury shows they are heading in the right direction at the most important time of the year.
"I thought we turned a bit of a corner on the weekend which was great to see but finals are a different kettle of fish," Davis said.
"We were a lot more energetic.
"We've been in second gear for most of the year I thought with getting close to finals footy does that.
"They are seasoned finals players and know what it at stake."
Ag College haven't beaten Waratahs in four years, including twice in finals last season.
However they take their strongest line-up yet into the clash.
Davis expects a tougher test this time around.
"They are young, fit and energetic," he said.
"We've probably got older heads but they bring probably what we lack and vice versa.
"There is a really good rivalry, and it is respectful, but that will go for 80 minutes and hoping we are the ones at the end of the day going through."