Under the current finals format, no team has come from outside the first four to win the flag.
Adelaide won the premiership from fifth position in 1998, but that was under a system where teams who finished fifth and sixth weren't necessarily eliminated if they lost in the first week of the finals.
Last year, the Eagles finished the home-and-away season in fifth place before being bundled out by Collingwood in an away semi-final.
West Coast is one of the flag favourites this year, and Priddis said it was crucial to grab a top-four spot and the double chance.
"We know we've got to win the majority of our games to give ourselves the opportunity," Priddis said ahead of Saturday's season opener against Fremantle at Patersons Stadium.
"We'd ultimately like to finish top four to give ourselves a chance to really win a flag.
"Darren Glass is a great leader and he's extremely excited about the guys coming through in the backline.
"From a midfield point of view, adding Mark LeCras and Sharrod Wellingham into it this year is going to give us great flexibility and depth.
"And the depth in the forward line is exciting."
West Coast has been hit hard by injuries during the pre-season, with Daniel Kerr (knee), Nic Naitanui (groin), Wellingham (ankle), Matt Rosa (quad) and Mark Nicoski (hamstring) all unavailable for the early part of the season.
Both teams are set to enter the match with little-known ruck combinations, with Naitanui sidelined and Fremantle without star ruckman Aaron Sandilands, who faces more time out after aggravating his injured left hamstring.
