Prime Minister Scott Morrison insists the Liberals won't do preference deals as an internal battle over the coalition's stance on One Nation rages.
Moderate Liberal MPs have been scathing about Pauline Hanson after the Christchurch mosque killings, saying her party should be placed last on how-to-vote cards because of racism.
But a rump of conservative Queensland Liberal-National MPs believe the Greens should be placed below One Nation.
The group, which includes Deputy Prime Minister and NSW MP Michael McCormack, has argued the environmentalist party's economic policies are more dangerous than Senator Hanson's views on Islam.
"We're not doing preference deals. Our party has its process for doing determinations at the time of nominations closing," Mr Morrison told reporters in Melbourne on Monday.
Opposition Leader Bill Shorten reiterated his commitment to put One Nation and other "extremist" parties last on Labor's how-to-vote cards after outgoing moderate Liberal Craig Laundy railed against One Nation.
"I wouldn't be keen to see One Nation supported in any way because I disagree with the majority of things that come out of One Nation candidates' mouths," Mr Laundy told ABC radio.
Victorian Liberal Tim Wilson said One Nation should be put "dead last" in his Melbourne electorate of Goldstein because of the party's long history of fanning bigotry.
"We should show spine, not be supine, and that means standing up to them and discrediting them at every single opportunity," he told Sky News.
"These decisions will be made by the prime minister and the secretariat but my view on what should happen in Goldstein is resolutely, absolutely clear."
Nationals MP Ken O'Dowd wants to put One Nation well above the Greens, while fellow Queenslanders Scott Buchholz, Keith Pitt, George Christensen, Llew O'Brien and Ian Macdonald also want the left-wing party last.
"They should be kept out at all costs," Mr O'Dowd told the ABC.
Agriculture Minister David Littleproud said he hadn't turned his mind to to preferences in his sprawling Queensland electorate of Maranoa.
"All I ask for people in my electorate is to give me a crack and put me number one," he told Sky.
He stopped short of saying the Greens were a bigger threat to Australia than One Nation, saying he would work through preferences with the state LNP organisation.
Meanwhile, failed state candidate Scott Yung is tipped to replace Mr Laundy in his Sydney seat of Reid which the Liberals hold with a 4.7 per cent.
ABC broadcaster Stan Grant and former NSW deputy police commissioner Nick Kaldas knocked back offers to replace Mr Laundy.
"It'd be sanctimonious of me to sit here and preach to the rank and file who they should select. I think they should select the best candidate for the job," Mr Laundy told ABC Radio National.