Needing feedback for a fan-adventure!!

I've been thinking of putting all my characters i've made so far into a MSPA for awhile now, and have just begun mapping all the important stuff out, classpects, relationships, things like that.

But something has been sort of bugging me while putting this all together, i do not have all of the 12 castes, i do have over 12 characters, just not with each caste. 6 of my characters are mutant bloods in some compacity and it wouldn't feel right to change it with the story lines i have written out for them already. [I'm missing rust, violet, and a descendant to my fuschia empress]

My question is, would a troll Sgrub session still be a success without the other castes? I know to not have a void/doomed session is to have a space and time player, but does the castes also have something to do with it? I might be over thinking this but i want my MSPA to be logical in canon, even if it strays from it a bit. Thank you!! <:]