Even though entering their maiden European adventure, Oliver Glasner's side are learning at a rapid pace. Missing star players like striker Jean-Philippe Mateta and defender Daniel Muñoz, the Eagles departed Dublin with a comfortable win that virtually secures them a spot in the Europa Conference League playoffs.
A further three points in their upcoming fixture against Finland's KuPS should be enough to seal straight entry to the last 16, especially following a previous stumble against Strasbourg.
This match offered a platform for some of Palace's lesser-used players to shine. Christantus Uche, making only his second start after arriving on loan from Getafe, notched the account with a well-taken finish. Forward Eddie Nketiah added a another, finding the net for the second game in match.
A Shelbourne side that had finished their league season proved outmatched even for a largely second-string Palace outfit. The visitors were already depleted by the news that Mateta and Muñoz are out with leg problems.
Despite heavy rain in Dublin, Palace quickly took control. A slick passing sequence in the 11th minute, initiated by Daichi Kamada's incisive pass, let Nketiah to lay on Uche for a straightforward tap-in.
Youngster Adam Wharton came close soon after, fizzing a powerful effort over the bar. Nketiah subsequently claimed for a penalty after racing into the area, but the referee dismissed the appeals.
Ex-Arsenal man did not have wait long to get his goal, prodding home from close range after Uche's effort had struck the post.
The home side were clinging on for dear life. Defender Kameron Ledwidge was fortunate to avoid a booking for two robust challenges on Yeremy Pino, before Chris Richards rattled the crossbar with a powerful header from a corner.
The contest was effectively over eight minutes before half-time. Yeremy Pino meandered past some weak challenges before calmly slotting a shot past goalkeeper Wessel Speel to make it 3-0.
After the break, coach Oliver Glasner seized the opportunity to withdraw key players like Kamada and Wharton. Replacement Romain Esse almost scoring his first touch, but saw his effort blocked.
Esse was incredibly unlucky later on, seeing one shot crash off both posts before being clasped on the line. Uche then missed a sitter of a chance, indicating there is still scope for improvement in his game.
The only concern for Palace was a second-half knock to Justin Devenny, who was forced off. This allowed 17-year-old striker Benji Casey to make his first-team debut, rounding off an otherwise perfect night for the visiting side.
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