The chart seems to vacillate from most important power to signature power depending upon the hero.
eg. Captain America is under "Super Strength" when his signature ability is "Discs Throwing Mastery" of his shield while Wolverine is under his signature ability "Claws" while his most important ability is "Super Healing".
eg. Captain America is under "Super Strength" when his signature ability is "Discs Throwing Mastery" of his shield while Wolverine is under his signature ability "Claws" while his most important ability is "Super Healing".
Still a glorious chart.