Having drawn three of their past four league outings, Danny Rohl made three changes from the side that were knocked out of the Scottish Cup by Celtic last weekend.
Much was made of their lack of cutting edge against Celtic last weekend - beaten on penalties after a goalless 120 minutes prior - and they once again struggled in the final third.
Chermiti and Naderi both struggled to get into the game and Tavernier had countless crosses headed clear by the home defence.
Mikey Moore was an ever-willing outlet and thought he had teed up a second in second-half stoppage time, but Thelo Aasgaard's finish was chalked off for a tight offside.
However, Raskin and Rommens produced the one bit of class and composure that mattered and at this stage of the season, results are more important than performances.
Rangers host Aberdeen and Dundee United next, before finishing their pre-split fixtures at Falkirk.
St Mirren were without Marcus Fraser and Keanu Baccus - who will likely miss the rest of the season through injury - and Declan John, who picked up a less serious issue in the build-up.
They join an already lengthy list of absentees and the Paisley club are still without a league win since 3 February.
With Kilmarnock's upturn under Neil McCann, particularly at home, St Mirren are at real risk of relegation after eight years in the top flight.
Despite three consecutive top-six finishes and a memorable League Cup triumph in December, they have struggled in the league all season and now have to navigate the final eight matches of the campaign without Robinson.
The new manager - whoever it may be - will have the hugely difficult task of reversing their recent form and avoiding the relegation play-off.
Image source, SNS
