Another former leader, Jeremy Hanson, also said the party should be open to forming coalitions with other parties or independents, acknowledging the more than decade-long Labor-Greens union in the ACT made it "very difficult" to win government.

The comments came as the Liberals said they expected all of their unsuccessful Yerrabi candidates from October's ACT election - including former MLA James Milligan - would nominate to replace Mr Coe when he resigns in March.

The countback of votes triggered by Mr Coe's resignation will likely see Mr Milligan returned to parliament.

Asked on ABC radio about his party's continual failure to cut through and win elections in the ACT, Mr Coe suggested the Liberals had struggled to use the ACT's multi-member electoral system to its advantage.

Only Labor's Jon Stanhope has governed with a majority in the ACT Legislative Assembly, with all other governments formed under power-sharing deals between parties or with the support of independents.

Whereas Labor has been able to rely on the ACT Greens to win seats and help it form government for more than a decade, the Liberals haven't had a strong ally on the right side of politics.

It means the Liberals have entered recent election campaigns needing to win a majority of seats in order to form government.

While he didn't rule out the prospect of the Canberra Liberals ever governing in their own right, Mr Coe said the party might need the help of a strong party or independent if they want to end their long exile in the ACT political wilderness.

"It may well be that the Canberra Liberals need to better develop alliances - and alliances that actually wins seats - in order to form a government in the future," he said on Monday morning.

The Belco Party, run by former Liberal leader Bill Stefaniak, did represent a second right-wing party in the seat of Ginninderra at last year's election.

But far from helping Mr Coe's team, the Belco Party appeared to fracture the conservative vote in the Belconnen-based electorate, with relatively few preferences flowing back to the Liberals.

"There are some nuances with the voting system that the right of politics still needs to better manage, and how we better harness people who don't want to vote Liberal but don't want to vote for the left of politics," Mr Coe said.

Asked to comment on Mr Coe's comments on Monday, Mr Hanson said the Liberals would be willing to work with another party to form government.

"When Hare-Clarke was envisaged there was a range of different parties and people will reflect on the early days of the Assembly there were any number, and no fixed coalition," he said.

"What we have seen in recent years is that there is a coalition between Labor and the Greens which makes it very difficult for other parties to form government.

"It comes down to us to make sure that we can either get the number of seats as the Canberra Liberals by ourselves, or form a coalition with other parties - and we'd be very open to doing that."

Mr Hanson paid tribute to Mr Coe, who on Saturday announced he was quitting politics after 12 years in the ACT Legislative Assembly.

Mr Hanson described the man who succeeded him as party leader as a "very good performer" who had a bright future ahead of him.