Prismatic overshadows the other subclasses so hard. Transcendence is easily accessible, infinitely sustainable and can be chained into a super which you chain back into Transcendence which you chain into another super ad nauseam. Even if you ignore Transcendence, Prismatic still makes other subclass gameplay loops completely obsolete (why would I bother using Combination Blow on Arc Hunter when the Prismatic version is better in basically every way?) The only Light/Dark subclass builds that have survived are the very strongest, niche PvP builds, or the ones that give you access to movement tech like Well/Shatterskating or Grapple.