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."