My son is starting to get serious, so i decided to do a pro-level setup on his Squire.
We took it to Starbucks and commandeered a table. The old nut had been filled and the string spacing/string path wasn't really great, so i whittled out a brand new one from a bleached bone blank.

Slots were held to .003" above string gauge with my standard picard horn profile. Angle across the nut is controlled by string winds on the post for "E," "A," "D," and "G" and is right around 10° which is exactly right.
(Note minimal low 'E' winds and progressively lower winds on the subsequent strings)
Only the "b" and "e" have a custom, extra-tall roller tree from Bitterroot Guitars, positioned so that all strings have the same angle.

First fret height is set to my preference (and this is also Fender and Gibson's published specs) of .020" and neck relief is .010" respectively.
12th fret action height is .070" which is how i setup all my guitars, but this is also the published specification of Fender, Jackson, Charvel, Gretsch, EVH, and Gibson.
Pickups were set to 8/64" with strings fretted at the last fret.
Man, this little guitar is really nice and stays in perfect tune.