Oh, sorry for not making it clear, when I meant permutation I was referring to the the immediately next permutation. I guess after current set is over you could

Oh, sorry for not making it clear, when I meant permutation I was referring to the the immediately next permutation. I guess after current set is over you could also take the Xth permutation of the current state, where X is a random integer. (so you randomly skip some permutations to not make it predictable).