Manager Rainer Bonhof's attacking options have been reduced with Aberdeen's Darren Mackie and Celtic's Shaun Maloney out.
Darren Mackie added a second after 76 minutes before Rangers' Nacho Novo was dismissed for a lunge on Stuart Duff.
Darren Mackie could have put the match beyond Raith in the dying stages but failed to connect properly with only the keeper to beat.
Dons manager Mark McGhee had preferred MacLean to Darren Mackie in attack, while Italian defender Davide Grassi stepped in to replace the injured Jim Paterson.
McGhee gave Darren Mackie the chance to level the score and rekindle the Dons' fading hopes of finishing in the top half of the league.
Darren Mackie fired the hosts ahead but seventh-placed Saints replied strongly.
The Dons should have equalised four minutes later when Paterson's corner found the head of Darren Mackie, but the striker somehow managed to head over from six yards.
Despite being a man down, Aberdeen continued to look dangerous and Zaluska had to make a vital block as Darren Mackie pounced on a poor pass-back from Willo Flood.
And slack play by Andy Webster was partly to blame for the opener, although Darren Mackie and debutant Marshall still had some work to do to fashion the scoring opportunity.
Referee Craig Thomson waved away the claims for a penalty, but that and a long-range curling effort from Boyd were rare moments of danger for an Aberdeen who had started without the injured Darren Mackie.
Aberdeen had offered little apart from a Sone Aluko shot that was blocked by former Don Scott Severin, but they posted a warning on 25 minutes when Aluko squared for Darren Mackie to shoot, forcing a brilliant save by Combe.
Chris Maguire was first to have an effort for the visitors after Darren Mackie won the ball in midfield, but the young striker took too long before shooting allowing Celtic keeper Fraser Forster to narrow the angle and put the ball out for a corner.
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