400m seems a little much when it comes to distances, land for larger tribes is sparse already can't you make this like 350 or something, it needs to be reduced.

I also touch on my last suggestions if they got lost in the mix

1. To many fires, reduce the number of fire rings to a cetain number of meters, passed a homestead today, one guy 11 fires. Not needed. so example 2 fires per 20m or something like that.
2. Trees environment doesn't need to be as active as it is, 4,000 swaying trees probably takes up a lot of memory. Reduce enviornmental stuff falling raindrops ect... can bring this stuff back once lag gets under control
3. reduce gathering time on sand
4. Increase gains from drinking water, or make water last longer.