Right from the top: Of all the Rangers’ problems during this disappointing follow-up to last year’s bang-up season, Rick Nash has been about the least of them.

Yes, no doubt, in yielding a pair of Blueblood forwards in Brandon Dubinsky and Artem Anisimov as part of the package that went to Columbus in exchange for the Big Easy, management did affect a change in the club’s chemistry.

But the more significant change in the Rangers’ DNA — the mos t significant change — was Brandon Prust’s exit from New York via free agency to Montreal.

And while the lack of a supporting cast has been cited as a root cause of the Rangers’ problems, the larger issue was the comparatively top-heavy lineup wasn’t getting enough production from its other putative top players, most notably Brad Richards and, before being dealt at the April 3 deadline, Marian Gaborik.

So, no, it isn’t Nash’s fault that these Rangers aren’t the Black-and-Blueshirts that preceded him. Still, as the club’s lone marquee forward and most accomplished goal-scorer in the aftermath of the Gaborik deal, it is essential Nash step up his game down the stretch of this race for the playoffs.

Which is exactly what No. 61 did in concert with his teammates in last night’s 6-1 all-but must victory over the 30th-overall Panthers at the Garden, the final score padded with three goals in the final 4:49.

Nash leads the club with 18 goals and 38 points, but he was coming off a pair of successive unimposing performances. He’d been marked closely, unable to create time and space for himself with his size and speed to produce the spin shot, power drive and quick wrist from the right circle that have become his signatures.