Amiss (62 goals), All-Australian centre-half forward Josh Treacy (56) and Patrick Voss (46) have been crucial contributors for the Dockers throughout the season.
But they were blunted by Hawthorn in the qualifying final defeat and were largely quiet again in the comeback win over Sydney in the preliminary final.
In between, the trio combined for seven goals in the semi-final win over Geelong.
They face an experienced Brisbane Lions defence led by Harris Andrews in Saturday's grand final.
"The fact that we've been able to do it over the course of the year, we definitely lose no trust or faith in any of us forwards," Amiss said.
"We're really connected, we stick together and we'll get the job done.
"We want to help each other all the time and there's going to be times when one player gets off (the leash) and the other two might have a quieter game, but we're fine with that.
"If we can help each other succeed and have a good game then we'll take that."
Forecast rain could be a factor, as it was when Amiss, Treacy and Voss combined for only two goals against Hawthorn.
"It becomes a contested game and I feel like we've proved throughout the year that we can play in wet games," Amiss said.
"We just embrace the contest and no matter what conditions face us we'll embrace that and problem-solve throughout the day."
Voss is a barometer for Fremantle - a natural energiser who can lift the side when he's on song.
He kicked four goals against Geelong and provided a spark with a huge stiff-arm on Sydney's Dane Rampe in the build-up to his crucial final-quarter goal last week.
Voss has also performed well at the MCG, kicking 15 goals in three appearances at the venue.
"The energy that he brings is awesome and it brings something different to our side, which we love, and to our forward line as well," Amiss said.
"It's a good balance for us. We've got so many different dynamics in our team and our forward line as well.
"We balance each other out. I can bring that calm sort of side and Vossy can bring that energy."
Fremantle have only three players in their team with premiership medals - Shai Bolton (Richmond), Luke Jackson (Melbourne) and Mason Cox (Collingwood) - while Brisbane have only two who haven't won a flag.
But Amiss isn't bothered by the Dockers' lack of experience on the big stage.
"They've got experience and have been here before but I feel like our footy has been good enough to beat anyone this year," Amiss said.
"The way we've come out of games and reviewed them and been able to back up performances holds us in good stead."
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