Despite entering their first-ever continental adventure, Oliver Glasner's side are learning at a rapid pace. Without key players like striker Jean-Philippe Mateta and wing-back Daniel Muñoz, the London club left Dublin with a comfortable win that virtually secures them a spot in the Europa Conference League playoffs.
A further three points in their next match against Finnish KuPS ought to be enough to seal direct entry to the knockout stages, particularly following a prior stumble against Strasbourg.
This occasion provided a chance for some of Palace's lesser-used players to impress. Christantus Uche, making only his second beginning after arriving on loan from Getafe, opened the account with a well-taken finish. Striker Eddie Nketiah contributed a second, scoring for the second game in succession.
A Shelbourne team that had concluded their league season proved no match against a mostly second-string Palace lineup. The visitors were further weakened by the reports that Mateta and Muñoz are out with knee problems.
Despite heavy rain in Dublin, Palace quickly established dominance. A flowing passing sequence in the 11th minute, initiated by Daichi Kamada's incisive pass, allowed Nketiah to lay on Uche for a straightforward tap-in.
Midfielder Adam Wharton went close minutes later, fizzing a powerful shot over the bar. Nketiah then claimed for a penalty after bursting into the box, but the referee dismissed the appeals.
The formerArsenal man did not have wait long to get his goal, prodding home from a yard out after Uche's effort had hit the post.
Shelbourne were clinging on desperately. Defender Kameron Ledwidge was lucky to escape a booking for two robust challenges 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 weaved past a series of comically weak challenges before coolly slotting a shot past goalkeeper Wessel Speel to extend the lead to 3-0.
Following the break, manager Oliver Glasner seized the opportunity to rest key players like Kamada and Wharton. Replacement Romain Esse almost scoring with his first touch, but saw his shot blocked.
The youngster was desperately unlucky later on, seeing one attempt crash off both posts before being gathered on the line. Uche also blazed a glaring chance, showing there is still scope for development in his game.
A solitary worry for Palace was a late injury to Justin Devenny, who limped off. This allowed 17-year-old striker Benji Casey to earn his first-team debut, rounding off an otherwise perfect evening for the visiting side.
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