That depends on how you play the game and what weapons you like to run so u can tailor character to the Faction you like the most and their perks and stats. Also you can do what I am going to do as some point is collect the armor for all the factions and run with no shaders and since I am sure most people are atleast rank 3 they an buy weapons that suit the perks of those factions. I just game another option to people who want a black shader. Is it the perfect solution no but it will still give them a black look to their guardian.