Finn Russell and Henry Pyrgos cemented their standing as one of most devastating half-back tandems in the league - and most importantly, they both came to life when their team needed them the most.
An ice-cool Russell kicked over the match-winning conversion against Ulster to send Glasgow through to the PRO12 final, and the pair were then on the scoresheet as Gregor Townsend's men reigned supreme against Munster.
The trophy marked a fitting end to Al Kellock's career but another lock in Leone Nakarawa stole the show in the final - slicing through Munster's defence like butter with a number of audacious carries and offloads
.
Edinburgh too helped Scottish rugby take another big step forward, notching ten PRO12 victories in a season for the first time since 2009, clinching the 1872 Cup, and reaching a European final to boot.
They sent early shockwaves across the league by edging Munster on the opening day of the season, while Sam Hidalgo-Clyne added his name to a long list of classy Scottish scrum-halves in a superb breakthrough year.
It perhaps spoke of Munster's spirit that, after a difficult start to the season, they rebounded to secure a PRO12 semi-final at home for the first time in four years.
No.8 CJ Stander won an incredible seven man-of-the-match awards in a superb season, including that semi-final, in which Munster clung on at Thomond Park to down the Ospreys 21-18.
Though the final proved a step too far for Munster, Ulster were denied an appearance at the Kingspan Stadium showpiece despite going so close to winning the semi-final at Scotstoun - where no team beat Glasgow last year.
But it nevertheless represented a fine first season under Neil Doak's stewardship as head coach with Craig Gilroy - leading the way with 11 tries - turning into a bonafide star for Ulster.
Leinster were one team conspicuous by their absence in the play-offs last year - finishing in fifth place after being crowned champions in 2013 and 2014.
A five-game winless streak between Round 16 and Round 20 put paid to their top-four hopes but, under new head coach Leo Cullen this season, they could well come back stronger than ever.
Indeed all four Irish provinces deserve all the respect they get as Pat Lam's revolution at Connacht continued apace, finishing seventh - their highest-ever league position in the PRO12.
They beat Leinster along the way to end their 11-match winless streak against other Irish provinces and should centre Robbie Henshaw continue his upwards trajectory, they could well go toe-to-toe with any side in 2015/16
.
Ospreys were the pick of the Welsh regions after returning to the play-offs following a two-year absence but their season ended in cruel circumstances, after Rhys Webb knocked on in the build-up of what would be a game-winning Josh Matavesi try in the semi-final against Munster.
No one can doubt Webb's contribution the cause last year - the scrum-half scored an incredible league best of 12 tries - and partner-in-crime, fly-half Dan Biggar, was named alongside him in the PRO12 Team of the Season.
Edinburgh finally ended Scarlets' 15-month long unbeaten streak at home in the PRO12 last season, but a trip to Llanelli remains one of the toughest trips on the calendar.
Scarlets may have slipped away from top-four contention during the PRO12's final straight but with youngsters such as Harry Robinson, Liam Williams, Jordan Williams and Scott Williams making up a youthful and frightening back-line, they showed enough to suggest 2015/16 could well be a successful one.
Newport Gwent Dragons too continued to blood some of their youngsters, taking some big scalps along the way despite finishing in ninth place.
They sensationally beat Leinster home and away - their first-ever double over the Irish province - and with the likes of Hallam Amos and Tyler Morgan involved in Wales' World Cup plans this summer, the future is very bright.
And the Cardiff Blues will be looking to put a line under their disappointing season, which saw director of rugby Mark Hammett come and go within a matter of months before finishing down in tenth.
But with Wales captain Sam Warburton, a rising star in back rower Josh Navidi and a year of PRO12 experience for Gareth Anscombe under his belt, don't count out a quick turnaround.
As for Benetton Treviso and Zebre, there were encouraging signs of progress during the year despite finishing second-bottom and bottom respectively.
Treviso drew with Leinster at home, beat the Blues and did the double over Zebre, who nevertheless proved they are no soft touch at the Stadio Aprile.
They defeated Ulster and the Dragons and came within inches of besting the Ospreys and Scarlets.
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