would a jadeblood's ideal aspect be blood, if they were rasing grubs? what class would that fit?

Classes, I don’t know. Aspect though, I think it’d be Space actually. See- I believe that Castes are bound to the Aspect of their True Sign. Socially they’re sort of forced into roles and stereotyped in ways relating to the True Signs, making the 12 Trolls basically the ‘ideal’ sort of Troll for the caste. As such, being isolated from the rest of the Castes, taking on a Caretaker role, Jades do seem to tie well with Jadebloods.