By three quartertime the Ferns had raced out to a 52-34 lead, before closing out a comfortable 24-goal victory.
The Silver Ferns will meet South Africa again tomorrow in Auckland in their final test hit-out before their opening match of the World Cup against Barbados on August 7.
The Ferns made just one change to their starting line-up from their 91-31 win over Fiji in Porirua last week, with Jodi Brown given the nod at goal attack ahead of Maria Tutaia, who was rested from the match after suffering an ankle tweak in training over the weekend.
Brown would have likely started tonight regardless of Tutaia's fitness, having impressed with her delivery of ball into the circle against Fiji. The veteran shooter further pushed her case tonight, finishing with a handy 32/39 return, while Mes netted 36/43 but was expensive in other areas, picking up three offensive penalties.
Meanwhile, down the other end of the court, Lenize Potgieter put on a shooting clinic, netting 39/43 to pick up the player of the match award.
With less than two weeks before the Ferns take on Barbados in their World Cup opener, tonight was all about meeting their own targets - both individual and collective - whilst continuing to test out new strategies on both attack and defence.
The South Africans, led by former Australian coach Norma Plummer, would have provided the Ferns with plenty to think about.
But Taumaunu will at least be happy with the performance of her second half defensive line-up with the addition of Leana de Bruin (GD) - the only player not to take the court in Porirua last week - and Kayla Cullen (WD) at halftime providing plenty of defensive spark.
The two sides meet again tomorrow night in Auckland.