There is an Elvaan NPC in Western Adoulin at (J-10) in the Inventor's Coalition named Benjamien. If you trade him the weapon, he will give you the option to Mezzotint it on one of the three available path, and then will give you a list of the three, letting you "preview" the rank 1 for each path.
For Aphotic Kukri, your three paths are
Path 1: Attack path, with Rank 15 stats of +10 STR, +10 Accuracy, and +15 Attack
Path 2: Accuracy path, with Rank 15 stats of +10 DEX, +15 Accuracy, and +10 Attack
Path 3: Evasion path, with Rank 15 stats of +10 AGI, +10 Accuracy, and +15 Evasion
If you choose a path, you can at a later point go back and wipe the progress on it, but any points you've used on upgrading the weapon will be lost, so if you took a Rank 10 Path 2 Aphotic and wanted to change it over to a Path 1, you could, but it'd start at Rank 0 again (as if you just obtained the weapon and had it mezzotinted, but not augmented) and all the points used to get it to Rank 10 would be lost.
Lady Jinte wrote:
Vlorsutes' Negotiation Skill rises 0.2 points
Vlorsutes' Observant Parent Skill rises 0.3 points
Vlorsutes' Argument Diffusing Skill rises 0.1 points