"One of the biggest contributing factors in our win was our fitness. We had a big lead in to the season and we were fit. Coming into matches fit is a big thing."
Edmonds singled out wing attack Karaihi Peina for special praise.
"Karaihi played a huge role on court with her work rate and availability to get free," Edmonds said.
WHS had a shaky start against Cullinane emerging from the first quarter four points ahead.
"It was quite close during that first quarter, but once we got into the game and warmed up we managed to draw away," coach Lisa Murphy said.
"Seven of my 10-strong squad are rep players and some also play basketball, so have been busy in the lead up to Monday night. Most of my girls are U17 reps with one, goal keep Kara Adrole an U15 rep and they have just returned from tournaments, so there were a few tired legs out their on Monday."
Murphy singled out her defensive players, goal defence Kristin Thompson and Adrole for special mention.
"They both had very consistent games."
Meanwhile, last season's runners-up Kaiwhaiki made it two from two when leaving Marist A1 in it wake after starting with a flurry to claim the first quarter 17-10. Kaiwhaiki were clinical leading throughout to win comfortably by 27 points.