If psionic abilities are caste locked why would Vriska phrase this the way she did: "she has a mix of telepathic a8ilities too, like mine, plus the animal communion kind more typical of 8rown 8loods." if brown bloods are the only ones capable of communing, why use the word typical?

All trolls have the genetic potential for all psychic abilities (see the Condesce) but the abilities do not naturally surface outside the castes they are associated with.