Donnell Wallam has helped guide Australia to dominate 77-50 win over South African in Hobart on Tuesday.

Wallam was one of four changes to the Diamonds starring side after shooting strongly in the second half against the Proteas on Sunday night.

In the series finale, the hosts capitalised on Wallam's height advantage over the South African defence happily feeding passes high to the Noongar shooter's trailing hand while holding under the ring.

Wallam shot seven straight before her first unsuccessful attempt to spearhead Australia's 22-11 quarter-time lead.

The 29-year-old went 15 from 18 at goals in the first period before shooting 12 from 13 in the second as the margin grew to 42-22 going into the main break.

Wallam's partner in the goal circle, Cara Koenen shared a little more of the scoring before half time.

Sophie Garbin subbed into shooter for the third quarter.

The swaps up front resulted in a short-lived slump to 15 goals and centre pass conversion to goal of just 64 per cent through the third quarter.

The wheels steadied for a strong finish with Australia sweeping their first stand-alone series against South Africa 3-nil, and 46th consecutive victory over the tourists.

It ends a bumper 2023 from the Diamonds after claiming the World Cup, and a 17-20 record in all internationals.

Upcoming years forecasts a fierce battle for a regular spot at the scoring end in green and goal.

Wallam began her Diamonds career with a last-gasp piece of heroics against England in 2022 before missing out on Australia's world cup triumph earlier this year.

Watching this again - and again - and again! pic.twitter.com/PuZyKtSncz

— Origin Australian Diamonds (@AussieDiamonds) October 27, 2022

Still getting started in her international career, former Diamonds captain Caitlin Bassett said she believes Wallam has every chance to feature strongly in future campaigns.

"I think we forget this is Donnell Wallam's fifth international game…the expectation that we've put on her to get out there and just be seamless is huge. She does deliver and she's such a fantastic target," Bassett told Fox Sports post-game.

"I think Wallam grows with every outing, she set (South Africa coach) Norma Plummer to make (defensive) changes...and that's not something that I rookie play often does."