So, the 130 IQ (+2 sigma) psychopaths are probably intelligent and self-aware enough to hold their "evil" tendencies in check and to succeed.
On the flip, the 70 IQ (-2 sigma) psychopaths probably do not have the self-insight to understand "why" they feel the way they do. Their impulse control will be much smaller, and they are much more likely to indifferently hurt people, commit crimes, and act on impulse.
I think we mostly are in agreement; I think the impulsive and antisocial tendencies of the psychopath are often self defeating and only the very intelligent navigate life successfully. We end up having a selection bias because we are likely to cross paths only with the latter subtype, so we end up believing that all psychopaths are superintelligent and verbally dazzling, while probably the majority of them is badly dull.