Not sure what this has to do with machinist. Machinist is not bard in 2.0 and can have whatever is balance. This also has nothing to do with mobility. The reason why bard was good in 2.0 was because because it was better than carrying any other class in general. It was required to have a bard in your party in 2.0. That's how good it was. Your comparing adding holy to warrior (adding reduction to machinist) with adding holy to summoner.
