
Adamantine Dragon |

Nuku, by RAW Point Blank Shot and other feats on that tree work with ray-based spells, which are treated as weapons.
It is not clear if by RAW spells like "acid splash" also benefit.
However, every GM I have ever played with, including me, allows the PBS tree to work with any ranged spell with an attack roll that targets a single creature.

Isil-zha |
I believe it was an actual FAQ but please don't ask me for a link it got posted as a reply when I (wrongly) stated that PBS wouldn't work with acid splash a while ago, and I just filed it away as something I've been wrong on for so long.
Edit: Or maybe DO ask me for a link - the one labelled SKR FAQ 2 is the one in question