Even though embarking on their maiden European adventure, Crystal Palace are learning at a rapid pace. Missing key players like striker Jean-Philippe Mateta and wing-back Daniel Muñoz, the Eagles departed Dublin with a comfortable win that all but secures them a place in the Europa Conference League playoffs.
A further three points in their next fixture against Finland's KuPS should be sufficient to secure direct passage to the knockout stages, especially after a previous setback against Strasbourg.
This occasion offered a chance for some of Palace's lesser-used players to impress. Christantus Uche, making only his second start after joining on loan from Getafe, notched the account with a well-taken finish. Striker Eddie Nketiah contributed a second, scoring for the second game in match.
A Shelbourne side that had finished their domestic season proved outmatched even for a largely second-string Palace outfit. The Londoners were further weakened by the reports that Mateta and Muñoz are sidelined with knee injuries.
In spite of torrential rain in Dublin, Palace quickly took control. A slick move in the 11th minute, initiated by Daichi Kamada's clever pass, let Nketiah to lay on Uche for a straightforward finish.
Midfielder Adam Wharton went close soon after, fizzing a powerful shot over the bar. Nketiah subsequently appealed for a penalty after bursting into the box, but the official dismissed the protests.
The formerArsenal man didn't need to wait long to get his goal, prodding home from a yard out after Uche's effort had hit the post.
The home side were clinging on for dear life. Full-back Kameron Ledwidge was fortunate to avoid a booking for two robust tackles on Yeremy Pino, before Chris Richards rattled the crossbar with a powerful header from a corner.
The match was as good as over eight minutes from half-time. Yeremy Pino meandered past a series of weak challenges before coolly dispatching a shot past goalkeeper Wessel Speel to make it 3-0.
Following the break, coach Oliver Glasner seized the opportunity to withdraw key players like Kamada and Wharton. Replacement Romain Esse almost scoring with his very first touch, but saw his shot blocked.
The youngster was desperately unlucky later on, seeing one shot strike off both posts before being clasped on the line. Uche then missed a glaring chance, indicating there is still room for development in his game.
The only worry for Palace was a second-half knock to Justin Devenny, who was forced off. This paved the way for 17-year-old forward Benji Casey to earn his first-team debut, capping an otherwise positive evening for the visiting side.