Living Story Spec
The “fractal” specs you will find on qtfy.eu or metabattle are designed to deal with relatively short-lived enemies with limited defenses, and comparatively weak bosses. That is a pretty solid description of what you will face during the living story.
You may end up trading some of the things for utility (eg: signet of the locust) or defense (eg: the caudicus fight) when you need them, but it’s pretty easy to figure out where it falls short, starting from that damage oriented spec.