Croudis, who regained his amateur status last year, played in a variety of team positions and lost only one of his 10 matches.
Mark Andrews (Taieri Lakes) was a star of the series, winning his first eight games, but finished on a low losing his final two games.
He lost to Michael Minty (Island Park) on the final green in round 10 and suffered another last green loss to St Clair's Cody McMullan in the semifinal.
John McIntee (Otago) emerged with the best percentage result in the series with a 94% win record.
He was captain of the Otago Gold team last year but, playing for Otago Blue this year, gained seven wins and a half from eight starts.
Chisholm's Jason Pegler looked set to join McIntee on the unbeaten list but suffered his only loss in round 10 to finish with six wins and two halves.
The Otago team's dominance is evident with five of the team members finishing in the top 13 match winners.
Brandon Hodgson (seven wins), Tyrone Ratahi (6.5) and Ben Patston (five) joined Croudis and McIntee in the top 13.
The team from the nine-hole Island Park Club failed to make the playoffs but emerged with some success having captain Michael Minty, Monty Wong and Michael Smith on the top list.
Matchplay success is a good indicator for selection for the national interprovincial team later in the year.
