Even though entering their first-ever continental adventure, Oliver Glasner's side are learning very quickly. Without key players like striker Jean-Philippe Mateta and defender Daniel Muñoz, the London club departed Dublin with a commanding result that all but guarantees them a spot in the Conference League qualifying rounds.
Another victory in their next match against Finland's KuPS ought to be sufficient to seal direct entry to the last 16, especially following a prior setback against Strasbourg.
This occasion provided a chance for some of Palace's lesser-used talent to shine. Christantus Uche, making only his second beginning since joining on loan from Getafe, notched the account with a clinical finish. Forward Eddie Nketiah added a second, finding the net for the second consecutive match.
The Shelbourne team that had concluded their domestic season were no match against a mostly second-string Palace outfit. The Londoners were further depleted by the reports that Mateta and Muñoz are sidelined with leg problems.
In spite of heavy rain in Dublin, Palace rapidly established dominance. A flowing passing sequence in the 11th minute, sparked by Daichi Kamada's clever 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 racing into the box, but the official dismissed the appeals.
The formerArsenal man did not have wait long to find his goal, prodding home from a yard out after Uche's effort had struck the post.
Shelbourne were clinging on for dear life. Defender Kameron Ledwidge was fortunate to escape a booking for two agricultural challenges on Yeremy Pino, before Chris Richards struck the woodwork with a header from a corner.
The match was effectively over eight minutes from half-time. Yeremy Pino weaved past a series of comically weak challenges before coolly dispatching a shot past keeper Wessel Speel to extend the lead to 3-0.
After the break, manager Oliver Glasner seized the opportunity to withdraw key individuals like Kamada and Wharton. Substitute Romain Esse almost scoring with his very first touch, only to see his effort blocked.
Esse was incredibly unlucky later on, seeing one shot strike off each posts before being gathered on the line. Uche also missed a sitter of a chance, showing there is still room for improvement in his game.
The only worry for Palace was a second-half injury to Justin Devenny, who limped off. This allowed 17-year-old striker Benji Casey to earn his first-team debut, rounding off an otherwise perfect evening for the visiting side.
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