Most of the weakness points stuff is just decided by the mods when they judge; we have a few policies, but it really depends on the context of each character. If someone else has the Oathstone, then that'd take a fair bit away, since they'd be essentially controlled by another character. You'd have to work some stuff out with that person. If the character controlling them is your own, then that's not gonna take many points away. If you plan to have them break out of being Truthless eventually like Szeth did, then that weakness would stop counting.