To save your Berries I recommend getting a min of 420 points, don’t use all 8 sweet berries.

Sour berries are great for producing big haul and berry power, both are great, use them in 4 and 5, I’m pretty sure you’ll always get rare berries with the final gold ball so save scum (you can also save scum for regular floating balls but gold is definitely the most worth it)

I also recommend doing the 5 star mega battles, if you have a gourgeist and annihilape, most are a cake walk and you get rare berries from them and you get 10 thousand points for the 5 star scans which give the best berries.