Parkinson combined well with highly regarded open side flanker Matt Clutterbuck and blindside Ezra Johnstone to snuff out any Te Puna counter attacks in the first half.
Trailing 29-0 at the break, Te Puna looked more composed in the opening salvos of the second spell and briefly threatened to get back in the game. They scored tries to first-five Te Aihe Toma and Villi Tia to close the gap to 29-10 with Parkinson and Taurima in the sin bin within a minute of each other.
Taurima's third try sealed the win but there was time for a late flourish from both teams that saw Ishimori score his second try to take Rangatau out to a 41-10 lead before Daniel Schuster crashed over for Te Puna to end the scoring.
Rangataua 41 (Ross Taurima 3, Daiyu Ishimori 2, Roha Dalton Reedy, Nathaniel Walker tries; Dan Groot 3 cons) Te Puna 15 (Te Aihe Toma, Villi Tia, Daniel Schuster tries)