This one, just like the one for strangle, is very easy to boost and wont take much time at all. However, it isnt that hard to get legit. All i did was have gust handy so i could wipe out elves with katanas that just smoke and then run away and hide (like all elves do). Chances are if you have gust handy, and theres an elf on the other team, you can get this in under an hour. You can also get kills for throwing someone off the end of the map, so dont rule that out!