A static charge aura helped me take out a few wyvern when I first got to sentinel island. The ones that came close I could take out with a bow; a few of them stayed out of range, but attacked enough to trigger retaliation that eventually killed them.
A couple times such enchantments have helped me spot opponents in cluttered environments, as you can see the direction the response is headed. Other than that, I wouldn't pick a piece of equipment for an enchantment (other than to get the formula), but even a small benefit is better than none.
