For the Fall 2023 season, that chart (and a fair amount of reading) persuaded me to substitute Petite Syrah for Mourvèdre as a minor player at 1/6, with 50% Syrah, and 1/3 Grenache.
I also found very authoritative pronouncements that a Côte du Rhonè must have 50% Grenache or Grenache and Syrah...