Monalisa Codling is the only other member of the squad to have played in all three previous triumphs, while four other players - Fiao'o Faamausili, Victoria Heighway, Emma Jensen and Casey Robertson - will be aiming for a hat-trick of titles.
Marist trailed Iona 15-13 midway through the first half before scoring 19 of the next 26 points to take a 32-22 lead on Emma O'Connor's jumper with 3:28 left in the half.