Voting Power * Reputation --> witness rank
I have been considering something like this even before @justinsunsteemit took over.
But not just for the witnesses but for everything in involving steem power. Notably upvotes and downvotes.
That would make most bots more difficult at a bot would need to build up reputation.
Mind you, better than merely multiplying would be a convergent reward curve like 1-e⁻ˣ where the reputation sets the upper limit on influence.
to late now.
RE: Reputational Enhanced Delegated Proof-of-Stake (REDPOS)