Avatiu Nikao Eels, Tupapa Panthers, Titikaveka Bulldogs and the Ngatangiia Matavera Sea Eagles have all made it through to the finals.
The top place finisher and minor premiership winner is yet to be decided however.
Eels currently lead the points table on 19 points, after 12 matches with nine wins, two losses and a draw.
Panthers are on 18 points with a game in hand after eight wins, two draws and a loss.
The Darren Piri-coached side will take on Aitutaki tomorrow and a win against the giantkillers would put them on top of the table with 20 points.
Defending champions Bulldogs are on third with 14 points, followed by the Sea Eagles on 12.
Arorangi Bears, who started the competition well, slumped to fifth place with nine points.
The Bulldogs’ rise on the points table is mainly due to their big wins against the formerly unbeaten Panthers and Eels.
The Meti Noovao-coached side is showing real mettle in the crucial round of the competition and will head into the preliminary finals as one of the favourites for the premiership title.
Bulldogs will host the Sea Eagles this Saturday in the final round of the competition.
In the other premier match in round 14, Bears will take on TKV Warriors.
Yet to register a win, the Warriors will be hoping to end the competition on a high this Saturday.