"They have just been telling me to get out there and be decisive," Dagg said.
"I know I just have to get that ball, carry hard, chase the kicks - whatever."
Coach Scott Robertson has used the trip to Victoria to rest a number of key men, including Matt Todd, Ryan Crotty, Owen Franks and Codie Taylor, while loosehead Joe Moody and lock Luke Romano will start on the bench.
As a result, veteran Wyatt Crockett will start in the No1 jumper, with Michael Alaalatoa at tighthead and Ben Funnell between them.
Quinten Strange joins skipper Sam Whitelock in the second row, while Heiden Bedwell-Curtis, Pete Samu and Jordan Taufua make up the loose forward trio.
Jed Brown has overcome injury in time to take a place on the bench, while test skipper Kieran Read remains on the sidelines with a broken thumb.
In the midfield, Seta Tamanivalu slips back into his traditional centre role after spending much of 2017 on the wing, with Tim Bateman at second-five.
- NZN