Even though entering their maiden European adventure, Oliver Glasner's side are adapting very quickly. Without star players like forward Jean-Philippe Mateta and defender Daniel MuΓ±oz, the London club departed Dublin with a comfortable result that all but secures them a spot in the Conference League playoffs.
A further three points in their next match against Finland's KuPS should be enough to seal straight entry to the last 16, especially after a previous stumble against Strasbourg.
This occasion offered a platform for some of Palace's fringe players to shine. Christantus Uche, in only his second beginning after arriving on loan from Getafe, notched the account with a clinical goal. Striker Eddie Nketiah added a second, finding the net for the second consecutive succession.
The Shelbourne side that had finished their league season proved no match even for a mostly rotated Palace outfit. The Londoners were further depleted by the reports that Mateta and MuΓ±oz are out with leg injuries.
In spite of heavy rain in Dublin, Palace rapidly took control. A slick passing sequence in the 11th minute, initiated by Daichi Kamada's incisive pass, allowed Nketiah to set up Uche for a straightforward tap-in.
Midfielder Adam Wharton came close soon after, driving a powerful effort over the bar. Nketiah subsequently claimed for a penalty after racing into the area, but the official dismissed the appeals.
Ex-Arsenal striker did not have wait long to get his goal, tapping home from a yard out after Uche's shot had hit the post.
The home side were clinging on desperately. Defender Kameron Ledwidge was fortunate to avoid a booking for two robust tackles on Yeremy Pino, before Chris Richards struck the woodwork 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 keeper Wessel Speel to make it 3-0.
After the break, manager Oliver Glasner seized the opportunity to rest several individuals like Kamada and Wharton. Substitute Romain Esse almost scoring with his very first touch, but saw his effort blocked.
The youngster was incredibly unlucky later on, seeing one shot strike off each 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 allowed 17-year-old striker Benji Casey to make his senior debut, capping an otherwise positive evening for the visiting side.
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