Looking to Lower Spellcaster's Rank - Is It Possible?

@gwenleah,  the only way I know of doing this is to use a cheat to change the Spellcaster levels! 🙌 I think you will have to get the NPC Spellcaster to join your household (and not as a non-playable roommate, but as a playable member of your household, at least temporarily).  In the past I've just befriended a Sim I wanted to move in and then asked them to move in , but with the new roommate system that allows you to have non-playable roommates, that might be more complicated.  Also, you might not wish to have your Sim actually befriend the annoying Sim.  Therefore, you can try to find them in the Manage Households menu and see if they are in the world or not, and if they aren't then you can place them in the world and into your household !  If you don't know how to do that you will need to go into Manage Worlds and then from that screen the Manage Households.  The Sim you want will probably be listed as not in the world, so make sure that that box is checked and not any of the others.  From there you can move them into your Sim's household with the Household Split & Merge interface.🙌 Once they are in your household you can then change their Spellcaster level by having them be the active Sim while entering the following cheats: 

Bring up the Cheat Box by pressing Ctrl + Shift + C 

IN the cheat box type testingcheats on and press Enter.

Then in the cheat box type
 Stats.Set_Stat RankedStatistic_WitchOccult_WitchXP # (The number will be an actual number from 50 - 3000 depending on what level you want the Sim to be at.)

Neophyte = 50

Acolyte = 350

Adept = 875

Master = 1550

Virtuoso = 2350
After you use the cheat, you can turn of the testing cheats by typing testingcheats off and pressing Enter. 

This should do the trick, as I was able to do it successfully! 😉
Please update us on of you have problems or if you are able to get this to work for you! 😇

@gwenleahAh, makes sense. I probably would not delete her then either. I see, you said that earlier! My apologies.

If you are trying to cheat occult ranks off, you probably need to remove the current rank first before you can add the new rank. That's how it works with half aliens anyway if you try to change them to full alien.

Otherwise @PugLove888  knows her business and gave good advice.

You can always try just giving her a makeover in the CAS and that may make her a little easier to deal with if she isn't rocking that "amazing" townie fashion.

@gwenleah, yes I thought of trying the Rite of Dissolution and then later giving her the Rite of Ascension as well, like you thinking it might work like a career and bring you down a level if you quit and then got reinstated.  So I tried it before I even posted the cheats because I know a lot of people don't like using cheats, so I was trying to find an in-game way of doing it. But as you found out, this doesn't work in resetting Spellcaster rank, or even knocking it down a bit! 😢  

But which part are you having problems with? 🤔 Are you having problems adding the Sim to the world to become playable, or are you having problems adjusting her Spellcaster level? (If it is the latter, then in the cheat, instead of the #, you need to only put the number for the amount of level points and not the # sign. 😉  

Also, do you play on a console or a PC or Mac?  If you play on a PC or Mac do you happen to use any Mods or Custom Content (CC)? 🤔  

Also, it is sweet of you to keep the Sim you don't like in order to please Simeon Silversweater! 😇  Simeon is a pretty nice guy! ❤️

Please update us on your situation! 🙂

Nope, it doesn't matter. All Mods are out of my game, no CC. That cheat just doesn't work. Maybe something's been adjusted since you were able to use it, Puggers.
I do appreciate your trying to help though! 🙂

@gwenleah, no, nothing was adjusted or changed as there have not been any patches since I posted with the cheat.😉  I tied the cheat before I posted it for you, and I just tried the cheat now and they worked both times! 

I know you removed your Mods and deleted the localthumbcache.package file from the game folder earlier, but did you also delete this file after you removed the Mod that you forgot about? 🤔 Sometimes bits of old or corrupted data can linger, and this is why deleting this cache file is so important. 🤨 Otherwise, even though you have removed the Mods, bits of it can still remain and effect your game! 😞

Also, Before you tired the Stats.Set_Stat RankedStatistic_WitchOccult_WitchXP cheat, did you enter the testing cheats on cheat first and then press Enter on your keyboard?🤔  The spellcaster rank cheat will not work without the testing cheats on cheat entered first! 

Also, I might have not been clear with the Spellcaster rank cheat 😳 ...  the Spellcaster that you want to change the rank of  should be the Sim that is active.  This is why they have to be made a playable Sim for this cheat to work.  Also, there should be a space before you enter the number of the level .  For example, it will look like this:
Stats.Set_Stat RankedStatistic_WitchOccult_WitchXP 550
And then press the Enter button again. 

To make sure you entered the cheat correctly, just copy from here and paste it in your cheat box after you enter the testing cheats on cheat. 😉  It is rather a long cheat! 😞😃

You can put in any value, depending on what rank you want the Spellcaster to be.  I was able to change a Master Spellcaster to an Acolyte by entering 550, but that is just one example. 🙂

Hopefully with this more clearer information you will be able to get it to work! 🤞

Please update us on your progress!😇