Three second-half tries from Glasgow Warriors were not enough to stop Toulon making it fifth time lucky with a 43-19 victory in the EPCR Challenge Cup final at the Aviva Stadium.After four final defeats, the French side hit Glasgow for six with three tries in each half as they eased to victory to give retiring Italian number eight Sergio Parisse a title-winning send off.Toulon were quickly into their stride and looked confident from the off as they chased their first Challenge Cup title at the venue where they won their first Heineken Champions Cup crown in 2013.They lost Wales out-half Dan Biggar with a head injury after only four minutes, then saw Australian centre Duncan Paia'aua go off for another HIA in the 32nd minute.They also lost influential scrum-half Baptiste Serin in the final move of the opening 40 minutes with a left knee injury that required a third change to their starting back division.There was a fourth alteration at the start of the second half when Mathieu Bastareaud came on to replace wing Gabin Villiers, who also failed an HIA.By then, though, Serin has sparked his side into life with two tries as they sped into a 21-0 interval lead.Toulon quickly recovered from the loss of Biggar and two minutes later, with Ihaia West on to replace the Welshman, Serin produced a moment of magic to get the scoreboard moving.After taking the ball from a ruck on the Glasgow 22 he dabbed the ball through the defensive line, regathered and just managed to touch down despite the efforts of Ollie Smith to turn him on his back over the line.The scrum half added the extras and then picked out 39-year-old Italian legend Sergio Parisse for a try at the posts after more pressure from the Top 14 outfit after Glasgow had lost a