Even though embarking on their maiden European campaign, Oliver Glasner's side are adapting very quickly. Missing key figures like forward Jean-Philippe Mateta and defender Daniel Muñoz, the London club left Dublin with a comfortable win that virtually secures them a place in the Conference League qualifying rounds.
Another victory in their next fixture against Finnish KuPS ought to be enough to seal straight passage to the knockout stages, especially after a prior setback against Strasbourg.
This occasion offered a chance for some of Palace's fringe players to shine. Christantus Uche, making only his second start since arriving on loan from Getafe, opened the account with a clinical finish. Striker Eddie Nketiah added a second, finding the net for the second consecutive succession.
The Shelbourne side that had finished their domestic season were no match even for a mostly rotated Palace lineup. The Londoners were further weakened by the reports that Mateta and Muñoz are out with leg problems.
Despite torrential rain in Dublin, Palace rapidly established dominance. A slick move in the 11th minute, sparked by Daichi Kamada's incisive pass, allowed Nketiah to lay on Uche for a straightforward finish.
Youngster Adam Wharton came close minutes later, fizzing a long-range shot over the bar. Nketiah subsequently claimed for a penalty after racing into the box, but the official waved away the appeals.
The formerArsenal man didn't need to wait long to find his goal, tapping home from a yard out after Uche's effort had hit the post.
Shelbourne were clinging on for dear life. Defender Kameron Ledwidge was lucky to avoid a booking for a couple of robust challenges on Yeremy Pino, before Chris Richards rattled the crossbar with a header from a corner.
The contest was as good as over eight minutes from half-time. Yeremy Pino meandered past some comically weak challenges before coolly dispatching a shot past goalkeeper Wessel Speel to extend the lead to 3-0.
Following the break, coach Oliver Glasner seized the opportunity to withdraw key individuals like Kamada and Wharton. Replacement Romain Esse came close to scoring his first touch, only to see his effort blocked.
Esse was incredibly unlucky later on, seeing one attempt crash off each posts before being clasped on the line. Uche then missed a glaring chance, indicating there is still scope for development in his game.
A solitary worry for Palace was a late injury to Justin Devenny, who was forced off. This allowed 17-year-old forward Benji Casey to earn his senior debut, rounding off an otherwise perfect evening for the visiting side.
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