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Call of Duty Black Ops Declassified.
You didn't pick one.
Call of Duty Black Ops Declassified.
I actually found grinding Luck to be way more tedious and time consuming. To fill 40 HP Sphere nodes you have to defeat a very easy guy (just 500,000 HP, no armor)with Overkill only once. On the other hand, to fill 40 Luck spheres you have to defeat a really tough foe (1,300,000 HP, armored against Overdrives)(Kottos)at least 20 times with Overkill.(Earth Eater)
You didn't pick one.