
I had no idea how 'enchant weapon' works with Enchanted Bow or other willpower-weapons, so I asked FFG. This is the response I got:
“Enchant Weapon” adds its owner’s willpower value to the attached asset’s combat value for the attack. Because “Enchanted Bow” does not use combat when taking a Fight action, it would not get a bonus to the skill value being used (willpower or agility). It’s worth mentioning that “Enchant Weapon” would at least grant “Enchanted Bow” +1 damage to the attack.
This is not at all what I expected. It seemed like these two would have a really cool synergy, but instead, it turns out it's just a very expensive way to do 1 extra damage.