
turing85 |

While each ray spell must make a ranged touch attack, the opposite is not true. There is no rule stating that each spell must fall in one of the given categories.
I would not categorize spells transformed by "Spell Reach" Metamagic as "Ray" and therefore not grant the bonus from Weapon Focus(ray).
Regarding the spellslinger, however, there is no downside.
Since it is a ranged touch spell, this bonus does apply.

Azothath |
just a ranged touch.
other methods
Long Arms
Spectral Hand with +2.
Use True Strike if you really need to hit with a ray or ammo.

My Self |
How ever on the plus side shocking grasp let's you mimic Emperor Palpatine quite nicely.
Be sure to be wearing a hood so you can go full dark side while you cackle about unlimited power.
Also, don't forget your Dazing, Intensified, and Merciful metamagics.
And only use it on the hero while his father is watching.