The so-called "big three" were the difference on a messy Saturday night at Suncorp Stadium, lifting down-and-out Melbourne to their first consecutive wins since round two.
Five-eighth Munster played a hand in one of the tries of the season, nabbed a four-pointer of his own, then put both Cooper Clarke and Harry Grant in to score.
"I thought he was tremendous out there tonight," said Storm coach Craig Bellamy.
Melbourne will still finish the weekend four points outside the top eight, but their season now appears to have a pulse following a highly publicised seven-game losing streak.
The form of Munster and captain Grant had been particularly concerning during the Storm's slump.
But the pair have looked more like their usual selves in the back-to-back wins, much to the relief of Maroons coach Billy Slater ahead of Monday's team announcement.
Munster's form is enough to make Bellamy, a New South Welshman, feel nervous ahead of the Origin series opener.
"He might've just been timing his run into Origin," the coach quipped.
"'Mun' always scares you, to be quite honest, in different ways at times.
"He probably didn't have the start to the season that he wanted and we wanted, but in the last month I think he's slowly matured."
Grant and Munster helped the Storm score one of 2026's best team tries.
Grant spotted the Eels' markers at sea, bursting through through the ruck and finding Munster in support.
The third member of Melbourne's triumvirate, Jahrome Hughes, wrapped around and triggered a shift to the left that ended in Jack Howarth capping the sparkling 60-metre break.
In the second half, Grant scooted out of dummy half to Hughes, who threw a beautiful flat ball for Munster to stretch onto the line.
Munster then cut inside with a short ball to big youngster Clarke, whose try followed a superb 25m run earlier in the half.
After a 75m tear from the electric Sua Fa'alogo, Munster threw the last pass for Grant to dive over and confirm the Storm's win.
Both sides were sloppy with the ball, combining for 17 errors in the first half alone and finishing with 31 between them.
Most notably, Davvy Moale dropped the ball as Melbourne carted back the second-half restart, only for Brian Kelly to return the favour on the Parramatta scrum play that followed.
The Eels' clumsy ways made it hard for likely NSW playmaker Mitch Moses to assert himself in his last game before Origin teams are picked.
"We just kept legging them up, bringing them into the game," said coach Jason Ryles.
"They certainly gave us some opportunities, but we didn't manage to take advantage of them."
A candidate for a NSW wing spot, Josh Addo-Carr went scoreless but made a brilliant defensive play mowing down Moses Leo following the winger's 60m dash.
He then ankle-tapped Fa'alogo just when the fullback looked certain to score in the second half.
Storm winger Leo suffered a knee injury in a tackle from Jack Williams and Saxon Pryke in the second half and did not finish the game.
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