The forward was a key part of the Jags side that claimed the First Division title last term and is now bidding to help Alan Archibald's side retain their SPFL Premiership status.
Just two points separate the five teams in the relegation battle ahead of Thistle's trip to Easter Road this weekend.
And Erskine, who returned to Firhill on loan from Dundee United in January, hopes the memories of their title-winning campaign can inspire the Jags.
He said: "It is a different pressure this season. Last year we had a lot of momentum and we felt that we were going to win every game.
"Now, we are scrapping for our lives. It is still enjoyable, though.
"You would rather have something to play for than going into the last few games with your season all but done.
"It is great for the league to have things this tight, the play-off spot has brought a different dimension to the league.
"We had a few must-win games last year if we wanted to win the league and we managed it so hopefully that experience will benefit us this year.
"We put a lot of hard work into getting here last year and to go back down would be horrible."
By this time last season, Thistle already had the First Division title sewn up after a head-to-head battle with Morton.
The club have produced a DVD to mark their promotion to the top flight after a nine-year absence.
And Erskine admits the highlights from an incredible season will live long in the memory as he nears the end of his second spell in red and yellow.
He said: "It was certainly my best season at Thistle and one I will always remember.
"It was a special year for the club and it is nice to watch the DVD and look back on it.
"It will be nice to keep for when I have finished playing and you can look back at the good memories of last year.
"We spoke last year and the boys know that it might never happen again for us. It is not every year you get a chance to go and win a league."