Okay so the basics of it is that Li-ion batteries love to stay at 50% SOC. This is when the electrons are evenly spread across and there’s the least amount of stress on the battery. The degradation depends on how long the battery spends at a % away from 50% along with other factors.
What most people do is a 30/40-100% charging cycle. Which is realy bad for the battery. I was suggesting 50-85% because then you don’t end up charging to 100% and you stay above 50% so that you can curb your range anxiety. Idealy youre better off charging from 35-65% if you need only 30% charge. But you’ll end the day at 35% and you might need to use a bit more on somedays and you might not have even juice in your battery. So chargring to 85% in the morning and using it in the day and draining it to 50% and leaving it overnight at 50% with a charge to 85% in the morning is the best way in my opinion. It’s nearly the best. The best would still bea 40-70% cycle with a 15% charge after your done with the day and the rest charging at the time just before using. Take a look at this article. It will help you understand a bit better https://batteryuniversity.com/learn/article/why_mobile_phone_batteries_do_not_last_as_long_as_an_ev_battery