Reluctant to single any one player out for praise, MacKenzie put the success down to great team defence and a solid attacking performance.
"It's just their will to win and the strong team culture and strong discipline that has won them back-to-back titles."
Focusing on three different competitions was not easy, but winning all three was hugely satisfying.
It was especially satisfying for the modest MacKenzie.
In 2016 he co-coached the Wanganui City women to the same three trophies with Blair Davidson.
The James Cup is awarded to the victors of a tournament between all club and school sides competing, while the renamed Super League is a competition featuring sides from Wanganui Athletic, Wanganui City, the River City Scrappers and Collegiate School.
The Senior Cup is competed for by club sides only.