Even though embarking on their first-ever European campaign, Oliver Glasner's side are adapting at a rapid pace. Without key figures like forward Jean-Philippe Mateta and defender Daniel Muñoz, the London club left Dublin with a comfortable result that virtually secures them a spot in the Europa Conference League playoffs.
Another three points in their next fixture against Finnish KuPS ought to be sufficient to seal direct passage to the knockout stages, particularly after a prior setback against Strasbourg.
This occasion offered a platform for some of Palace's fringe players to impress. Christantus Uche, in only his second start after joining on loan from Getafe, opened the account with a clinical goal. Forward Eddie Nketiah added a another, scoring for the second consecutive match.
The Shelbourne team that had finished their domestic season proved outmatched against a largely second-string Palace lineup. The visitors were already depleted by the reports that Mateta and Muñoz are out with leg problems.
In spite of torrential rain in Dublin, Palace quickly took control. A flowing move in the 11th minute, sparked by Daichi Kamada's incisive pass, allowed Nketiah to set up Uche for a straightforward finish.
Midfielder Adam Wharton went close soon after, driving a long-range effort over the bar. Nketiah then appealed for a penalty after racing into the area, but the official waved away the appeals.
The formerArsenal striker did not have wait long to find his goal, tapping home from a yard out after Uche's effort had struck the post.
Shelbourne were hanging on for dear life. Full-back Kameron Ledwidge was lucky to avoid a booking for a couple of robust challenges on Yeremy Pino, before Chris Richards rattled the woodwork with a powerful header from a corner.
The contest was as good as over eight minutes before half-time. Yeremy Pino weaved past some weak challenges before calmly slotting a shot past goalkeeper Wessel Speel to make it 3-0.
Following the break, manager Oliver Glasner seized the opportunity to withdraw several individuals like Kamada and Wharton. Replacement Romain Esse came close to scoring with his first touch, but saw his shot blocked.
Esse was desperately unlucky later on, seeing one shot strike off both posts before being clasped on the line. Uche then missed a glaring chance, showing there is still scope for development in his game.
The only worry 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 earn his senior debut, rounding off an otherwise perfect night for the visiting side.
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