I use basic at full HD+ resolution. I have my brightness at a 3rd the way up with auto brightness off. I turn it on outdoors only. I keep wifi on at all times. I have always on display turned off(not to save battery but I don't think it's a feature that is that useful for me.). Apart from that I just use it and don't worry about it. I'm heading home with 51% remaining and I was streaming to my Bluetooth speaker at work am night. 3 hours and 20 minutes SOT with 16 hours and 27 minutes total usage. I'm very happy with that.
All in all, I'm happy with the battery and it easily sees me through the day. I think you can drive yourself mad comparing to others becsie while the main settings might be the same/similar, the apps using battery in the background will be different.