For resource classes, playing 100% optimally, such as protection paladin, will net you both the highest dps and highest survivability, by design. And this is true for most, if not all tank classes... You have to go out of your way to choose dps trinkets, gems, enchants and to a degree stat selection on gear. But even that you should optimize, if you never need a survivability talent or trinket, change for offensive and do even more dps..