Even though embarking on their first-ever European campaign, Crystal Palace are learning very quickly. Missing key figures like striker Jean-Philippe Mateta and wing-back Daniel Muñoz, the Eagles departed Dublin with a commanding win that virtually secures them a spot in the Europa Conference League playoffs.
A further victory in their next fixture against Finland's KuPS ought to be enough to seal direct entry to the last 16, especially after a prior stumble against Strasbourg.
This match provided a chance for some of Palace's lesser-used talent to shine. Christantus Uche, making only his second beginning after joining on loan from Getafe, notched the scoring with a well-taken finish. Forward Eddie Nketiah contributed a another, finding the net for the second consecutive succession.
A Shelbourne side that had finished their domestic season proved no match against a mostly second-string Palace lineup. The visitors were already weakened by the news that Mateta and Muñoz are out with leg injuries.
Despite heavy rain in Dublin, Palace quickly took control. A flowing move in the 11th minute, initiated by Daichi Kamada's incisive pass, let Nketiah to lay on Uche for a straightforward tap-in.
Midfielder Adam Wharton came close minutes later, driving a powerful effort over the bar. Nketiah then claimed for a penalty after racing into the area, but the referee dismissed the appeals.
The formerArsenal striker did not have wait long to find his goal, tapping home from close range after Uche's shot had struck the post.
The home side were clinging on desperately. Full-back Kameron Ledwidge was lucky to escape a booking for two agricultural challenges on Yeremy Pino, before Chris Richards struck the crossbar with a header from a corner.
The contest was effectively over eight minutes from half-time. Yeremy Pino weaved past a series of weak challenges before calmly dispatching a shot past keeper Wessel Speel to make it 3-0.
After the break, manager Oliver Glasner seized the opportunity to rest key individuals like Kamada and Wharton. Replacement Romain Esse almost scoring with his very first touch, but saw his shot blocked.
The youngster was incredibly unlucky later on, seeing one attempt crash off both posts before being clasped on the line. Uche then blazed a glaring chance, indicating there is still room for improvement in his game.
The only worry for Palace was a late injury to Justin Devenny, who was forced off. This allowed 17-year-old forward Benji Casey to earn his senior debut, rounding off an otherwise positive evening for the visiting side.