With 18 wins from 24 regular-season matches, the Warriors have established a club record during Andrew Webster's 2026 campaign.
They return to Eden Park on Sunday for a sudden-death semi-final against Newcastle, with a preliminary-final meeting with the Panthers awaiting the winner.
More than 48,000 supporters are expected, eclipsing the New Zealand Rugby League attendance record of 47,363, set during the 1988 World Cup final.
James Fisher-Harris has represented New Zealand at the stadium and understands its effect on visiting teams.
"Eden Park gives me Test footy vibes. Everything goes up a level for me personally.
"Watching the All Blacks do their thing here, it's definitely a fortress for them."
The Warriors last played there in 2014, beating Canberra 54-12, but Fisher-Harris says this season's earlier haka against Penrith carries greater significance.
They followed that performance with a 28-12 victory over his former club.
"I think that's No.1."
Last week's defeat by the Dolphins forced the Warriors into the longer route towards the grand final.
Fisher-Harris wants greater precision after their opening finals performance.
"Ruthlessness, we missed it on the weekend.
"I'm keen to play the best game."
He also stressed the importance of their final home match.
"We are going to leave it all out there.
"Not fuss about the result, but more about the performance."