Inquisitor of Desna - Should I...?

[liamfisher]

Suggestions for a melee inquisitor.

The Heirloom Weapon trait can grant proficiency on a weapon of your choice. But you would have to pay for a Masterwork Transformation spell.
Or you could pick a race that grants proficiency with a good weapon.  
Otherwise you face a feat tax. Half=Elf can take the Ancestral Arms racial trait in place of skill focus.

With that ONE weapon, ever.