Just thought i'd cross post these from BGG in case anyone checks on the game here:
1. If a player takes every moon personality card (4 total) they score zero for those cards.
2. Likewise for the suns.
3. If a player is the only person to score points in a round they instead score 0. All the points for their personality cards are instead split evenly between the other players. (The points for the moons/suns will still be split even if they satisfied rules 1 and 2).
We play with all 3 active each game and it works really good. We also play to 100 points for a 3 player game.