I didn't say they were bad, I said they were the worst

The only contender would be Whitesmith, but they have a higher damage output and are more versatile and useful in WoE.
Mediocre damage output in PvM and completely, absolutely worthless in WoE compared to any other rebirth class. They're fine to farm on
private servers with @autoloot (which is a very broken command btw), but that's it. Decent to kill the half dozen relevant ghost enemies in the game, but useless on any serious map like Biolabs 3 or at any other high-level MVP.