First-five Tim Priest (West Coast) added two conversions and two penalties, including one 50m effort.
As well as Rowe, Nick Cranston was again at lock while prop Shaun McDonough and loose forward Lasa Ulukuta both came off the bench for the final quarter.
Back said captain Rowe had another massive match to go with his effort the previous Tuesday against NZ Defence Force when he completed 29 of 33 tackles.
"A huge work-rate in both games. You get these guys in an environment where they can flourish, and it just goes to show you."
Unfortunately, the locals had less presence than planned as Wanganui Marist's Bradley Graham had been selected for the Marist team, but found himself missing out on the day.
"There was a communication issue. [Marist] thought we were playing with five props under the international rules but domestically it's 22 [players]," said Back.
"They had 23 players, and Brad was the 23rd."