WEST Coast is soaking up Sam Mitchell's September know-how ahead of Saturday's knockout final against Port Adelaide.

Eagles assistant coach Dean Cox says tapping into Mitchell's finals prowess – four premierships amid 24 finals at Hawthorn – has been a priority.

"'Mitch' has played a hell of a lot of finals," Cox told reporters on Friday.

"And what he can bring is obviously experience and composure when the heat is on. We lean on people with that experience. Why wouldn't you?"

Cox said the footy nous of Mitchell, who will retire at season's end, was invaluable for the Eagles.

"It has shown all year," he said.

"He adopts a playing style a little bit different to what Hawthorn did, he has bought in fully.

"(He) has probably tweaked a few things and done things a little bit differently, which some of our players get the experience and exposure to look at."

The Eagles have the most experienced team in the finals and Port the least, in what Cox predicted would be a fierce final at Adelaide Oval.

"It's a do-or-die final ... both sides are going to go hell-for-leather," he said.

West Coast picked an unchanged side, which Cox said hadn't happened since the start of last season, to reward the team that downed flag fancy Adelaide a fortnight ago.

"To change a side just for the sake of it is probably not the best move leading into finals," Cox said.

"You want stability and that is what we have got."

The Power will be without key backman Tom Jonas, who is suspended, but Cox said the Eagles' forwards can't flourish without consistent supply.

"We have got to make sure that, first of all, we get as much supply to our forwards as we possibly can," he said.

"Last time we did play them here, they beat us by 30 inside 50s.

"We do have a dangerous forward line ... but their backline, they're in the top few for conceding points against.

"So they're sticking with a side that has played really good football all year as well."