Gordon D'Arcy (ankle), Isaac Boss (hamstring) and Sean O'Brien and Nathan Hines, who have minor knocks, were rested after the bruising win over Northampton Saints.
Brian O'Driscoll successfully came through the victory in Cardiff following the knee injury which had rendered him doubtful in the build-up to the final.
Meanwhile, Jonathan Sexton's 28-point haul against Northampton brought his season's tally in both competitions to 228 points in a game which was his 75th in Leinster colours.
On the other end of the scoring spectrum, Leinster's only other points scorer on Saturday was Scotland international Hines who touched down for the first time in 45 appearances for the province.
In a further boost, Leinster will be backed by a travelling support of well in excess of 6,500 fans at Thomond Park.