Diablo 4 Season 3 will feature the Seneschal, a robotic companion that can join the fight or heal and defend you. That definitely sounds like the kind of thing that could add a whole lot of power to your build, but Blizzard says it's unlikely to nerf the Seneschal unless things get absolutely ridiculous.
Since the Seneschal "won't exist outside of Season 3," designer Sean White explains in an interview with GamesRadar+, the devs can take wilder swings without worrying too much about game balance. "You know, I've always said that there's breaking the game and breaking the game. As long as it's not too horribly overpowered, we're likely to leave it alone. But again, I want to stress we'll take those on a case-by-case scenario because it depends on how much it breaks the game."
