Sending a clear warning across the region, Rose says Southcity has not yet hit top form – by a long stretch.

"We've got a lot improving to do," Rose said as Southcity celebrated a rollicking 36-20 victory over Kangaroos at Equex Centre on Saturday.

"At the moment we're pretty hot and cold."

True to Rose's assessment, the Bulls gave Kangaroos a seven tries to four thrashing, but also ran up a sizeable error count in the process.

Southcity, however, also showed glimpses of absolute brilliance to deal another body blow to Roos chances of sneaking into the Group Nine finals.

At the halfway mark of the season, Roos hopes are faltering, if not completely dashed.

In contrast, Southcity is definitely gunning for top spot – and is the team to standing in the way of Albury's bid for a hat-trick of premierships.

Rose thinks the Bulls are certainly heading in the right direction.

"We're all working together as team," he said.

"That's helping all of us (as individuals).

"We just want to improve each week, and play the best we can."

Without doubt, Southcity lived up to Rose's Jekyll and Hyde rating early in Saturday's game.

The Bulls pounced for two tries in the opening eight minutes to lead 12-0, but blew most of the lead in a fateful four minutes.

Roos fullback Tom Webb scored off what appeared to be a forward in the 11th minute before halfback Liam Duffy did the damage before Mitchell Blackstock steamed over in the 15th minute.

The two quick fire tries got Roos back to 12-10 down, but the revival was over almost as fast as it started.

With Southcity captain-coach Daniel Fitzhenry in dazzling touch, the Bulls grabbed another two tries before half-time to be bolting at 22-10 at the break.

Needing a miracle recovery, Roos got a horror start to the second half with Bulls speedster Jack Lyons scooping up a loose ball and racing 85 metres for a telling try in the 42nd minute.

By the time Fitzhenry and Pani Manwatu put prop Brent Snowden over for his first try in the top grade in the 48th minute it was curtains for Kangaroos.

Wounded captain-coach Adam Hall said later the result wasn't a total disaster.

"The boys made a pledge to win the last 20 minutes, and they did," Hall said.

"There was no shortage of character."

The Bulls roared out to a 36-16 advantage when Wil Merritt scored a juggling try in the 59th minute, but Roos pulled out the last try in the 78th minute, courtesy of Lachlan Cuell and his own juggling act.

As Southcity contemplated a shoulder injury for gun second rower Nick Skinner, Roos were in strife of their own, with Hall, and three other players all in doubt with injury for Sunday's daunting road trip to Albury.

The Bulls will need to check Skinner before next Sunday's clash with Junee at Equex Centre, but have ample quality replacements.

For Southcity on Saturday, Fitzhenry was the star, but Rose, Skinner, Manawatu and Mitch Curran were also excellent.

Duffy, Glenn Dumbrell , Blackstock deserved accolades for Roos, but others in the team were found dreadfully wanting.