based on feats and hype I'd say preta path would eat totsuka.
Not only is it the rinnegan's ultimate defensive jutsu, but it actually has some high end absorption feats like absorbing pure bijuu chakra shrouds after it hits it or absorbing super dense FRS. In addition to that, a spiritual weapon is made out of spiritual energy, which is one of the components of chakra. Preta path has been shown to absorb raw natural energy which is also just a component of chakra, not senjutsu itself, thus i don't see why it would also not apply to absorbing raw spiritual energy (if totsuka is actually not made out of chakra).