People don’t like playing Court Wizard for a reason. It feels useless, and is pretty under powered.
For comparison, the Physician, even if the Neutral Killer is a Reaper, has one chance to save someone on average every night. That’s one chance to save someone per night. If you have a Possessor or Sorcerer, that goes up to 2 chances. And that doesn’t even count curing poison or bleeding.
On the other hand, the Court Wizard has one chance per 2 nights to save someone from conversion. While it may save a Blue Dragon and prevent a new evil from rising, considering all the other things Physician can save you from, it is the weaker class.
Now it can stop occupation, but this can also serve as a negative utility. For one, it can make the Drunk/Butler think you are immune, when you aren’t. It also effectively wastes Butler/Drunk’s night.
To make this a good class, it needs to change focus. I have one idea here, but I’m sure there are other solutions.