Mr Peters has ruled out going into any coalition with race-based parties, ruling out the Maori Party and Internet Mana.
He also has a public loathing of both Act New Zealand and the Conservative Party, the party he accuses of stealing NZ First policies.
Labour leader David Cunliffe has also ruled out any cabinet positions for the Maori party and continues to say the Greens and NZ First were the only parties he would be prepared to offer ministerial posts to after September 20.
Mr Peters is famous for keeping New Zealand guessing over the formation of a government and kept the country waiting for more than a month before deciding to go with National after the first MMP election.
He then switched to Labour the following election, after being fired by former National prime minister Dame Jenny Shipley.
In a speech this week, Mr Peters took a swing at both Labour and National but his message was clear: NZ First was not in favour of an extension to the present capital gains policy favoured by Labour, and National's promised tax cuts for 2017 needed to be put aside in favour of a change in direction towards ''real export growth and savings''.
Labour would probably not get his support without providing some sort of compensation for capital losses as part of a capital gains tax package.
There would also need to be a recognition of NZ First's export tax policy to encourage offshore investors of the wisdom in investing in New Zealand for production and export purposes.
''In addition to being a serious wealth creation measure, this would seriously enhance employment in our country, which is the second objective that would determine whether offshore money was genuine foreign investment or merely a corporate raid with no new production, no new wealth or no new jobs.''
National's tax cuts announcement was the party having a private laugh at the public's expense, he said.
''When have you ever heard of a party campaigning on 'virtual tax cuts' for an election beyond this one? This, of course, follows the Finance Minister [Bill English] saying there is not room for it.''
But Mr Peters is probably forgetting his one-time political ally, former National finance minister and treasurer Sir William Birch who, in the 1990s, promised tax cuts well into the future, as long as voters re-elected National.
When National was in coalition with NZ First, Sir William was finance minister and Mr Peters was treasurer, in theory the senior role, although most believed Sir William did the work behind the scenes.
When Mr Peters was sacked, Sir William assumed both roles but his understudy was Mr English.
Mr Peters said NZ First did not intend to go into negotiations after September 20 and sell out the interests of New Zealanders.
National used to have a range of people in its hierarchy who could be used to woo Mr Peters. They have mostly moved on or retired.
However, one or two remain at the Beehive and that may give National an edge over Labour in securing the support of Mr Peters.
