I can just tell you what I do. I post, comment, zap to the top posts daily. And I always try to add value to value.

My highest on daily is around 6k or 7k... Just don't remember but I was placed 7th on the leaderboard very recently.

For others, you can see the daily leaderboard here https://stacker.news/rewards and judge about the maximum rewards for all ranks. For top Stackers, I can see around 10k sats. It all depends on the pool which is also there on the leaderboard.