More like representative egalitarian scientist philosophers. They would not have total power, but they would have large influence. Think of an alternative governmental body, like the house and senate. You could even still have sortition as a separate body (a la Assembly). But this wise body would determine what was technically and logistically the best outcome, rather than purely moral. You could reject what the wise impartial person found through analysis, but it would be a difficult argument, because everyone would trust in impartiality and correctness, the same way we do in science. We could prefer what the whole body agreed upon, as it would be the most widely accepted scientific findings.