The roster is not set.

Indeed, the Rangers are primed to make at least one unkindest cut before Thursday’s season opener at the Garden against the Islanders, and perhaps two if management yields to the temptation of recalling Boo Nieves to Broadway following two impressive exhibition-game performances this weekend for the AHL Wolf Pack.

“It’s 50-50 right now, but probably more no than yes,” Alain Vigneault said of a possible instant promotion of Nieves, the 22-year-old rookie who played just one preseason match for the varsity after being sidelined most of camp with a suspected concussion. “French math.”

If Nieves, whose size and speed have caught the coach’s fancy, is recalled, a forward would go the other way. Josh Jooris, who would have to clear waivers, is the most likely candidate.

But it’s on defense where the Rangers are essentially committed to a trim from eight to seven. And while it is possible that management takes the path of least resistance and cuts Brady Skjei, the one defenseman who does not require waivers, to get down to its number, it is far more likely Dylan McIlrath becomes the casualty.

The Blueshirts are believed to be seeking a trade partner for McIlrath, the 24-year-old who had a disappointing camp coming off an encouraging 2015-16, but in which — probably to both the team’s and No. 6’s own detriment — he played only 34 games as Vigneault stuck through thin-and-thinner with veterans Dan Girardi and Dan Boyle.

The Rangers, who seem to believe 23-year-old free-agent signee Adam Clendening better suits the quick-decision, quick-puck-moving style that it is vogue not only in Vigneault’s camp but throughout the NHL, would just as soon not place McIlrath on waivers, so maybe a decision on his long-term future could be deferred.

“I thought Dylan played well, played to his strengths, worked extremely hard and was giving it his best shot,” Vigneault said when asked about McIlrath’s camp. “He was trying to put his best foot forward, and now we’re trying to figure out where he fits on the team.”

Clendening, a righty with previous short tours in Chicago, Vancouver, Pittsburgh and Edmonton, can play the left, though he had a very tough time of it on his off-side in last week’s final preseason game against the Flyers. McIlrath plays the right exclusively. Clendening also could be a power play point option if in the lineup.

Nick Holden is in the top six, though it is unclear whether the lefty would play left or right. If Clendening is not in the opening night lineup on the right, then either Holden or Skjei would have to shift to that side. McIlrath does not appear to be in the mix as a top six, even if he remains with the club.

The Rangers’ top nine forwards are set, though it is unclear where Rick Nash and Jimmy Vesey will start. One will play with Derek Stepan and Mats Zuccarello while the other will play with Kevin Hayes and J.T. Miller. If Nash is with Hayes, then Miller will play the left, which is probably his best side. If Vesey is with Hayes, Miller would play the right.

The makeup of the fourth line is unclear. Jesper Fast is a lock, but if Brandon Pirri — who worked on the power-play point during Monday’s practice — is in the lineup, then either Jooris or veteran penalty-kill specialist Michael Grabner would be out against his former team. The latter seems like a stretch.

If Nieves is recalled, though, it would be to play. In that case, either Grabner or Pirri would be an opening-night scratch.

Decisions are still to be made, but they must happen both before cap-compliant rosters are due in to the league office at 5 p.m. Tuesday and before the opening faceoff on Thursday.