Enhancement cores are completely useless they provide absolutely nothing to armor the only thing that you should master work is your weapons . Infuse only when you find something you know you are going to use often and for a long time . Armor with the so called random rolls is also useless the only perk that seems to work is recuperating. So find armor that you like the look of apply a shader and done . Other than that the cores are useless and just not needed to play the game.