Despite entering their first-ever continental adventure, Oliver Glasner's side are learning at a rapid pace. Missing key figures like striker Jean-Philippe Mateta and wing-back Daniel Muñoz, the Eagles departed Dublin with a commanding win that all but guarantees them a spot in the Europa Conference League qualifying rounds.
Another three points in their upcoming match against Finland's KuPS should be enough to secure direct entry to the last 16, particularly following a previous setback against Strasbourg.
This occasion provided a platform for some of Palace's fringe talent to shine. Christantus Uche, in only his second start since arriving on loan from Getafe, notched the scoring with a well-taken goal. Forward Eddie Nketiah contributed a second, scoring for the second game in succession.
The Shelbourne side that had concluded their domestic season were no match even for a largely rotated Palace lineup. The Londoners were already depleted by the reports that Mateta and Muñoz are sidelined with leg injuries.
In spite of torrential rain in Dublin, Palace rapidly took control. A slick passing sequence in the 11th minute, sparked by Daichi Kamada's incisive pass, let Nketiah to lay on Uche for a simple tap-in.
Youngster Adam Wharton came close soon after, fizzing a long-range shot over the bar. Nketiah subsequently claimed for a penalty after bursting into the box, but the referee waved away the appeals.
Ex-Arsenal striker did not have wait long to get his goal, tapping home from close range after Uche's effort had hit the post.
Shelbourne were clinging on desperately. Defender Kameron Ledwidge was lucky to escape a booking for two robust challenges on Yeremy Pino, before Chris Richards rattled the crossbar with a powerful header from a corner.
The contest was effectively over eight minutes before half-time. Yeremy Pino meandered past a series of weak challenges before coolly slotting a shot past goalkeeper Wessel Speel to make it 3-0.
Following the break, coach Oliver Glasner took the chance to rest several individuals like Kamada and Wharton. Replacement Romain Esse came close to scoring his very first touch, but saw his shot blocked.
Esse was incredibly unlucky later on, seeing one shot crash off both posts before being clasped on the line. Uche also blazed a sitter of a chance, showing there is still room for improvement in his game.
A solitary concern for Palace was a late injury to Justin Devenny, who was forced off. This paved the way for 17-year-old striker Benji Casey to make his senior debut, rounding off an otherwise positive evening for the traveling side.
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