This one’s seen some service and needs a little TLC..
Frets are a little worn for a start, not terribly even either so a dress will sort both problems.
While I’m at it a bone nut, the old one’s a bit wonky anyway.
It’s got to come out to do the dress anyway.
With the neck perfectly flat…..
level off the frets, re-shape and polish.
Next the new nut. Although you can get pre-shaped blanks the radius of the bottoms don’t always match the fretboard and slot.
With the new nut fitted all I need to do is a setup..
No.1 Neck relief..
Just a small turn on the truss-rod. 
The trem’ was sitting rather high so I tightened up the springs.
That’s better…
No.2 then the action height at the 12th fret.
No.3 the action at the 1st fret. Since the nut is new it’ll take a bit of work to get it down to where I want it. 
After that check the intonation and pickup heights and it’s good to go.