Professional Crafted gears can be leveled 10 times by Obliterum or Primal Obliterum. You need to prepare 20 Blood of Sargeras or 10 Primal Sargerite for each Professional Crafted gears.

Since the Artifact Weapons added in Legion, so all BOE class packages exclude for the weapon.
The BOE package ilvl is the average ilvl from all pieces of gears in this package, which does not include the artifact Weapon level.
The weapon ilvl can upgrade by the Third Slot unlock and Artifact Relics.

Tips: You can specify two random primary stats for Profession Crafted items, but it is unavailable for single stat(Such as "Of the Impatient" - Haste, if single stat specified, that is 2 Haste stats). For more information please feel free to contact our online support.