I don’t know and I don’t care how algorithms work. But when every perk combination drops, except the most popular (aka god-roll) one, then I can’t accept this is just “random” or “luck”. F that.
From over 60 No Survivor rolls, only one dropped with heal clip, incandescent, and that’s not even a 5 out of 5 roll.
Meanwhile exact roll combinations are dropping back to back.
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60 is simply not a large enough sample size to make any conclusions. The odds are meant to be against you from the outset regardless. Getting what you want means you "stop playing" and they can't have that.