Tony Vargas
Legend
Are comparatively rare and only affect saves, some spells take attack rolls others neither attack nor save.Legendary resistance. magic resistance.
MR's Advantage on a save is of little benefit when your save bonus is low....
Rarely all of them. Enemies will virtually always have at least one bad save.Enemies saves scale with level as well.
Its rare that swapping weapons will swing an opponents AC by 5 or 10 points.