Waldron dominated proceedings at Bathgate Park with a haul that included four tries and eight conversions.
The significant difference between the teams was the turnover ball that the Alhambra-Union forwards continued to get after Southern had advanced a few phases.
Front-rowers Pip Love and Paige Church made plenty of runs - they each scored a try - and the forwards were able to deliver good-quality ball to the backs. No8 Nic Crawford scored two tries and was supported by Zoe Whatarau, who took her opportunities playing her first full game at loose forward.
Fullback Joslyne Umpherville scored two tries for Alhambra-Union.
Southern's star player was second five-eighth Summer Van Loenhout, who scored both her team's tries. The first came from a turnover when she had to outpace the defenders and run 70m, and the second when she showed some gymnastics skills and broke out of a tackle after receiving the ball from a scrum.
Kate Vallely, Mikayla Sheck and Meghan Roberts helped the Southern forwards stay competitive.
University scored 13 tries to beat Kaikorai 77-5.
With the University forwards providing clean ball, Jenna Aikman provided excellent service for five-eighth Megan Manson to set away the pacey University backs.
Aikman used her speed and fitness to touch down for a hat trick, rewarding outstanding support play. Leyhana van Vugt was in commanding form in the loose, seemingly ranging at will and ably supported by lock Zoe Wills.
With Kaikorai a little short on the bench, University players Michaela Baker and Black Fern Anika Tiplady pulled on Kaikorai jerseys. The added direction and a little more structure saw saw a never-say-die Kaikorai score a well-deserved try.
Pirates scored seven tries in its 44-10 win over Blues in Invercargill.
The Southlanders were competitive in the forwards but had no answer for Pirates backs Greer Muir, Sheree Hume and Jess Offen, who all scored tries.
