If you care fairness, I have 1 extra suggestion that you might be interested in. It was proven by several data-science research that when users have to votes (or give ratings) and if they are able to see the previous result, then the first few votes have an extremely important effect. For instance here is one stury, very well written article by a famous teacher Robert West, "of sheep and beer" https://dlab.epfl.ch/20…
You can see a form of this effect on HN itself, in particular in Show HN topics. First few comments basically set the tone of the discussion and its dynamic. If they are shallow, negative or dismissive, the discussion gets stuck and takes a while to recover even if the submission has a lot of actual merit.
This is from personal experience, not from any study, so take it with a ton of salt.