Even though entering their first-ever European adventure, Oliver Glasner's side are adapting at a rapid pace. Missing star players like striker Jean-Philippe Mateta and defender Daniel Muñoz, the Eagles left Dublin with a commanding win that all but secures them a spot in the Conference League playoffs.
A further three points in their upcoming fixture against Finland's KuPS should be enough to secure direct entry to the last 16, particularly following a previous stumble against Strasbourg.
This match offered a chance for several Palace's lesser-used players to impress. Christantus Uche, making only his second start since joining on loan from Getafe, opened the scoring with a clinical goal. Striker Eddie Nketiah contributed a another, scoring for the second consecutive match.
The Shelbourne team that had finished their domestic season proved outmatched even for a largely rotated Palace lineup. The Londoners were already depleted by the reports that Mateta and Muñoz are out with leg injuries.
In spite of heavy rain in Dublin, Palace rapidly established dominance. A slick passing sequence in the 11th minute, sparked by Daichi Kamada's incisive pass, let Nketiah to set up Uche for a simple finish.
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 official dismissed the appeals.
The formerArsenal striker did not have wait long to get his goal, prodding home from close range after Uche's shot had struck the post.
The home side were hanging on for dear life. Defender Kameron Ledwidge was fortunate to escape a booking for a couple of agricultural challenges on Yeremy Pino, before Chris Richards struck the crossbar with a powerful header from a corner.
The contest was effectively over eight minutes before half-time. Yeremy Pino weaved past some comically weak challenges before coolly slotting a shot past goalkeeper Wessel Speel to extend the lead to 3-0.
After the break, manager Oliver Glasner seized the opportunity to rest key individuals like Kamada and Wharton. Substitute Romain Esse came close to scoring his first touch, only to see his effort blocked.
Esse was desperately unlucky later on, seeing one shot strike off each posts before being gathered on the line. Uche also blazed a sitter of a chance, showing there is still room for improvement in his game.
A solitary worry for Palace was a second-half injury to Justin Devenny, who was forced off. This paved the way for 17-year-old forward Benji Casey to make his first-team debut, capping an otherwise perfect night for the traveling side.
Wildlife biologist and sloth enthusiast with over a decade of field research in Central American rainforests.