last 10 teams to win the cup seems to have a recurrent tandem of elite 1C, oftentime two-way and elite 1D:
2023: 1C (Eichel), 1D(Pietrangelo)
2022: 1C(Mackinnon), 1D(Makar)
2021: 1C(Point/Stamkos), 1D (Hedman)
2020: 1C(Point/Stamkos), 1D (Hedman)
2019: 1C(O’Reilly), 1D (Pietrangelo)
2018: Different formula
2017: Different formula
2016: 1C(Crosby), 1D(Letang)
2015: 1C(Toews), 1D (Keith)
2014: 1C(Kopitar), 1D (Doughty)
2013: 1C(Toews), 1D (Keith)
the times the formula for 1C + 1D wasn’t respected happened to be for teams with generational talent in Ovechkin or Crosby.