Marrar head into finals with a nine-game winning streak after demolishing Barellan 24.15 (159) to 4.3 (27) on Saturday.
Small forward Tyler Cunningham led the way with six goals as the Bombers racked up their highest score of the year and their third straight triple-figure total.
"The most pleasing part of the last month is the way we're playing as a team," coach Shane Lenon said.
"Obviously we're hitting the scoreboard but they're doing all the little things for each other. We're leading, creating space, shepherding and doing all the one-percenters and that's certainly helping us to kick a score."
Ruckman Nick Molkentin and skipper Jackson Moye continued their excellent seasons while backmen Adam Whyte and Mitch Taylor made strong returns from injury.
Jack Hillman led Barellan's effort on a disappointing finish at home.
The Bombers kicked the last 17 goals of the game and have a healthy selection headache as they head into a qualifying final against East Wagga-Kooringal on Saturday at McPherson Oval, with four senior players set to return.
"That's a good problem to have, it means there's pressure on for spots and that's healthy for your club," Lenon said.
Marrar will be chasing a 10th win in a row when they take on the Hawks - who they beat by 11 goals two weeks ago - after wrapping up with a perfect second half of the regular season.
"We've obviously got confidence and momentum but the home and away season is done now. Four sides go into cricket practice and five sides are still alive and fighting for survival," Lenon said.
"Obviously North Wagga's been the best home-and-away side, they've got the minor premiership. But it's a different season in finals and the best team in the finals will be the team that wins the grand final."