West Australian skipper Justin Langer says the side is still searching for its best batting combination as it prepares for the crunch ING Cup match with Victoria at the WACA Ground on Friday.

WA needs to beat the Bushrangers to reach the final of the one-day trophy, with both Queensland and NSW still in the hunt for a finals berth as the Cup reaches its final round.

Just three points separate the three sides, with WA and Queensland able to reach the final if they win their games.

WA used its seventh opening combination in nine ING matches this season in the heavy defeat by NSW on Wednesday.

Langer, who averages 106 as an opener in the competition this season, batted at number four.

After making only 203 against NSW, the Australian Test opener admitted the team was still trying to find its strongest batting line-up.

"I have been saying for the last few months that we are experimenting to try and get the best combination," Langer said.

"It is easy if you lose a game to pinpoint the change in batting order as the reason, but that has worked for us as long as I have captained West Australia.

"The NSW result makes Friday a tough game but there is no need to panic. We have been playing very good cricket the last few months and just got beaten by a very good and experienced side."

Victoria's David Hussey will face his younger brother Mike in a competitive game for the first time in the day/night clash, while the Bushrangers will welcome back vice-captain and wicketkeeper Darren Berry following his two game suspension for failing to turn up at a 6.30am training session.

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