You saying that GG requires good aim further proves my point that you are a dumb hunter. Nova bomb takes some REAL aim to be good because it hits everything that sticks out of a wall and you have to account for gravity. Also, you don't have to be behind someone for backstab to occur. It triggers behind and from the sides as well. You have a chance of getting a one hit melee without your melee charged, even if they are facing you, I got it to work twice yesterday when I was using on my hunter.