The hosts have maximum points after beating Tonga A and Junior Japan, and face Samoa A in today's final round-robin clash in Suva.
Tonga and Japan square off in the early match, with both teams needing to win big to draw level with Fiji on ten points.
They also need Samoa A to knock off the defending champions and deny them a bonus point.
Warriors coach Senirusi Seruvakula said they would not be letting up.
"We want to finish the competition on a high note and we're taking this game against Samoa very seriously."
"They've got a big pack and then the backline they just rely on their number ten. Our game plan is we just want to use the whole width of the ground and shift around the ball and the guys to showcase their talent."
Seruvakula said the Fiji team still has plenty of room for improvement.
"Another important area we want to work on is it's our discipline, for the whole 80 minutes, and we will work on our set pieces, so that those are the areas that we can easily score tries...we just need to have possession at all times and go forward."