Samoa set a national scoring record with a 78-4 defeat of France, their biggest points total and winning margin.
The result was built on a blistering start: Samoa crossed five times in the first 17 minutes before adding more points late.
Sua Fa'alogo scored four tries, with another effort ruled out.
Jarome Luai created three tries, while Spencer Leniu made 11 forceful carries and broke seven tackles against a French pack that delivered heavy contact.
Samoa still face challenging matches against PNG and Tonga. Their potent backline could give them confidence against both rivals if it continues its strong form.
Luai and Leniu are set to join the Eels next year. Samoan stalwart Junior Paulo has also signed a new deal with Parramatta.