Lets discuss Black Ops 2

[Zaliphone]

I don't think you can actually get 10 perks. If I'm correct, you can only have 2 of each perk anyway, because the wildcard that allows to get another perk takes a point, add that to the cost of the two perks and that's already 3. Two more times and that's 9 points taken. And with that one point you could get the tomahawk (excuse me, "Combat Axe") and run around with that knife.