The Wallabies open their Pool A campaign against Fiji at Millennium Stadium in Cardiff on Sept.
23 and are back in action four days later against pool minnows Uruguay at Villa Park in Birmingham.
Attack coach Larkham, speaking from the team’s training base in the United States, said the squad would be split into two groups after they depart for England on Sunday.
“Once we get over there it is 10 days before the first game and we are splitting into two teams basically,” he told Sydney’s Daily Telegraph.
“We will have one team getting prepped for Fiji while the other team is prepping for Uruguay.
“One team will, for example, have a captain’s run on the Tuesday and the other team, that will be their Monday session. It is a tricky week once we get over there so this week in the U.S. will be our last chance to train together until Uruguay.”
Head coach Michael Cheika said at the start of the season he wanted two or more players ready to slot into any position without disrupting the system and he has chopped and changed his selections accordingly over the last five tests.
Even world class players like flanker David Pocock have spent time on the bench, chiming with Cheika’s 23-man philosophy and the importance he place on the impact of the bench.
The limits of a 31-man squad mean he will be forced to name some of the team he has decided will face Uruguay to populate the bench against Fiji and vice versa.
Larkham suggested, however, that with an eye on the final two pool fixtures against hosts England on Oct. 3 and Wales a week later, the contribution of the replacements might be limited.
“The plan at this stage is along those lines,” the 102-cap Wallaby added.
“Trying to give one whole team as much time as possible (against Fiji), and the other team as much time as possible in the other game, so we are not burning the players out.”
(Reporting by Nick Mulvenney; Editing by John O’Brien)