I’d suggest giving Universal GMS Doze a try. It’s not as aggressive as Xtreme Battery Saver, so you won’t risk bootloops, but it still helps a lot with standby drain by putting Google services into deeper sleep when the phone’s idle. Works well alongside Battery Honey, since Honey handles general tweaks while GMS Doze specifically targets background Google processes that usually keep the device awake.
I’ve been running it for a while without any stability issues, and the battery life improvement is noticeable, especially overnight. If you’re looking for something safe that won’t hurt performance, this module is worth checking out.