How To Limit Party Size With 姫HimeWorks Party Switching Scene

I'm trying to make a game where you have a max party size of three members. However there would be eight potential characters to switch between. I've been trying to use the Party Switching Scene to achive this but no matter what I try it always says you can pick four party members.

I've been messing with it for hours but can't get it to work how I'd like. Is there a way to fix this?

you can't.

you misread the description - tsukihime specifically states that the plugin uses the regular maximum battle party size as the size limit for the party switching, but it does NOT provide a way to change that number.

you'll need another plugin to change the maximum battlerparty-size, but if you have that then this plugin will automatically adapt to the new size.

I have a plugin that limits party size but it still shows a fourth slot.

then either they're in the wrong order or incompatible to each other.
Give links to both and we can try to help here.

I'm using the yinfly party system,the Himeworks Pary Manager as well as HimeWorks Pary Switching Scene. They are in that order with Yinfly at the top and Pary switching scene at the bottom.

I asked for links, not names
and that combination could well be incompatible as yanfly's party manager and the party switching scene have the same function...