And it's not reliant on aerial kicks for superstar fullback Israel Folau.

Beale believes the Wallabies' best chance of beating the European champions in Saturday night's series decider in Sydney will be through traditional ball-in-hand rugby - Australian style.

While the Wallabies won't ditch the high kicks for Folau and winger Dane Haylett-Petty, which have yet to reap try-scoring rewards in the first two split Tests, Beale says retaining possession will be key at Allianz Stadium.

"It's important that we don't shy away from our running game," the Wallabies midfield maestro told AAP.

"We know that we've got the best threats on the park when we've got ball in hand, on those edges.

"So as a playmaker and a guy who helps with direction of the team, it's important that we keep backing up.

"That's certainly helped us in the past and how we like to play the game so we've got that up our sleeve as well.

"We'll just try and have that really good balance like we did in game one."

Beale, in his first year back in the Australian gold after a season in the English Premiership, believes the threat of rain makes controlling possession even more critical.

Discipline will also be imperative, with the Irish having slotted six penalties, including four last Saturday in Melbourne, to level the series despite only scoring two tries to Australia's five.

"(If it's wet), it's something they're going to be used to," said the classy centre.

"They've got a really good kicking game with their halves in Connor Murray and Jonny Sexton there.

"So playing in the right end of the field when it's weather like this certainly releases the pressure and doesn't put you under pressure with errors with ball in hand in your own half, and then allowing them to transfer that into points.

"It's being smart and I feel like we've got a really good understanding of that and it's just about executing the kicks and executing the right play at the right time."

A first three-Test series win since beating the touring British and Irish Lions in 2001 could vault the Wallabies back to No.2 in the world ahead of the Rugby Championship starting in August.

Australian Associated Press