A little bug I found for It's All Fun and Games - Quest - World of Warcraft.
The range on the item you get is 80 yards, while the range on The Ocular's beam is about 70-75 yards, giving you a nice dead zone to where you can attack it, and stay safe from his attacks.
Noted: You have to move in closer for the last shot or else you won't get credit for killing The Ocular.