The Flames have never really had a true tandem.
82-84 maybe as Lemelin and Edwards shared the net but then Lemelin owned it, passed to Vernon, passed to Kidd
97-98 Kidd/Tabaracci was close
Then Brathwaite for a few years, Turek for two years and the Kiprusoff era.
Ramo/Hiller in 2014-2016 is possible.
Rittich/Smith in 2018-19 was close.
I just don't remember a Lemelin/Moog or Fuhr/Moog point in Flames history with two stud goaltenders at once.
https://hockeygoalies.org/bio/nhl/calgary.html