A National party vote elects no extra Coalition MP. The electorates have already filled its share. Maximise your votes by splitting them: party-vote NZ First or ACT.
Zero list seats, on current polling
On the latest Taxpayers’ Union–Curia poll National is entitled to 35 of the 120, treating Opportunity’s 4.8% as 5%. It currently holds 44 electorates. Hold those seats and National takes no list MPs — a nine-seat overhang. Extra National party votes refill a filled quota. They do not add a Coalition MP.
Move the party vote to a partner still taking list seats. That is how one ballot helps put two Coalition MPs in the House.
On current polling a National party vote elects zero MPs. A protest vote for a non-parliamentary party is the same. Party-vote NZ First or ACT to keep the left out.