The big win keeps them in second place in the table and they have now scored 19 goals in their last three matches.
Natasha Knapman (pictured) showed her deadly finishing in London by scoring five times in Sunday’s match, which was the start of four successive away trips.
Argyle were without the unavailable Jessie Jones but did include new signings Bow Jackson and Lydia Huntley on the bench.
The visitors set their stall out from the start and after going close on a couple of occasions took a 10th minute lead when a well-worked counterattack resulted in Knapman finding the corner of the net.
A second goal quickly came when a long ball towards the back post found Amber Polloock, whose header found Knapman and she reacted the quickest to poke the ball over the line.
Argyle continued on the attack and the predatory Knapman completed her hat-trick by tapping in a cross.
It became 4-0 just before half-time when defender Molie Taylor was on target.
Argyle were not necessarily at their best but it was their all-round work-rate that always gave them the upper hand.
The Pilgrims, who brought on Jackson for her debut on the hour mark, kept on the attack and were rewarded in the 64th minute when Knapman got on the end of a cross to score her fourth goal from close range.
Manager Dave Leonard then made a double substitution in the 71st minute with Huntly coming on for her debut, along with Steph Beck.
The changes did not affect Argyle’s play as two minutes later the unstoppable Knapman headed in her fifth goal to make it 6-0.
The visitors kept up the pressure and with nine minutes remaining Becky Dandridge showed excellent control before volleying into the corner of the net.
The luckless hosts then conceded an own goal when Chloe Tucker diverted the ball into her own net.
After the game Leonard said: “A good result, but to be honest I did think we were at our best. We were a bit sloppy in possession, but we knocked in eight goals away from home and do I am very, very pleased.
“I still think there is a lot more we can give, but there was a team that had to be beaten and we did a professional job. We set standards at this football club but what we have got to do is repeat that every week.”
He added: “Now we are getting into a bit of a rhythm it is my job to keep them on their toes and we will be working them hard in training.”
Argyle: Becky Kyle, Leah Burridge, Kate Middleton, Leah Burridge (Bow Jackson), Mollie Taylor (Lydia Huntley) . Faye Ivall, Kayley Lane, Zoe Cunningham (Steph Beck), Becky Dandridge, Amber Pollock, Natasha Knapman. Not used: Ebony Dover.
Meanwhile, Argyle’s development team suffered a third straight defeat when they went down 3-1 away at St Agnes in the South West League Western Division.
The young Pilgrims had the lion’s share of possession, but unfortunately they were very wasteful in and around penalty area in the opening 15 minutes.
And they paid for that as St Agnes took the lead when a simple through ball found Mollie Dring and she beat Maddie Walsh in the Argyle goal.
This seemed to knock the stuffing out of the development team and they soon found themselves trailing by two goals as a defensive mistake allowed Dring a carbon copy of her first goal.
The Argyle youngsters were really struggling and five minutes before half-time Abi Carveth wriggled past two defenders to add a third for the home team.
The visitors appeared a totally different side in the second half. They went for St Agnes from the first whistle and it was Nicola Champion who almost reduced the arrears.
Then a through ball from Kiara Robins found Dee Newman, whose shot was saved by Mayers.
The game was mainly being played in the St Agnes of the pitch and Argyle finally got their breakthrough when a corner from Rachel Heron ended with Lucy Solloway getting the final touch.
The young Greens were certainly buoyed by that and straight from the restart, Robins won the ball and played the ball to Wyatt, who put Champion in on goal. Her first effort was blocked but she chipped the ball into the area for Wyatt to head home. The referee gave the goal and there was no flag from the linesman for offside but they decided to have a conversation and disallow the effort – much to the annoyance and bewilderment of the Argyle staff.
Undeterred the youngsters continued to push forward, Champion, Newman and Robins all had efforts smothered and Wyatt having an effort cleared off the line. Despite a better showing in the second half the final score finished 3-1.
Coach Scott Robertson said: “We had a reasonable start but we were very wasteful in front of goal and trying shots from ridiculous distances.”
Manager Rob Bonney could not hide his anger adding: “We were awful in the first half, no tempo, no cohesion and very little effort. They were told in no mean terms at half-time that the standards in that first half are not acceptable at this club.”
Argyle Development: Maddie Walsh, Jodie Randall, Rachel Javan, Leah Johnson, Beth Cowd, Hannah Brock, Rachel Heron, Kiara Robins, Lucy Solloway, Dani Wyatt, Nicola Champion, Maddy Leppard, Maisie Williams, Chardonnay James, Dee Newman.