I've retitled everyone in my Dwarf Fort, so that whenever my Psychiatrist kills someone the Autocracy knows who to punish.
Dissidents die first, 'cause they don't support the glorious leaders! (They're put-off by tradition.)
Next are the Weak, as they don't work hard enough. (Mostly just physically weak or flimsy dwarves, though there's this one migrant in the caste that's missing both of his arms.)
Then the Toler caste, which are merely average.
The Encor caste are favored among the disposable castes, for their admiration of our ways. (The ideal citizen in PepperWalls is someone who will report the murder of their best friend, witness an "innocent" get hammered, and feel ecstatic about getting to attend therapy with the "pillar of society" that killed their friend.)
Finally, Nobles include both actual administration duties and magic-wielders, and do not get punished.