[Magisk] eierfrucht:
Pie seems to handle hibernating the apps well enough without extra intervention on Greenify's side.

Still, some of Greenify's options may be of use:

- Aggressive Doze (enter Deep Doze in minutes, not hours)

- Doze on the Go (don't interrupt Dozing when significant motion is detected, i.e. walking / driving)

- Greenify Assistant (replaces Google Assistant, Lock / Put to Sleep the mobile simply by pressing the ◯ button)

This is where you probably should stop with Greenify on Pie -- without explicitly adding anything to the hibernation list -- unless there's an app or two that wake your device from Doze for no good reason. There are a couple of asshole-designed third-party apps on my phone that interrupt Doze for reasons they deem 'high priority' but obviously serving no good purpose as far as my personal ends are concerned. So I have nearly every third-party app on my Greenify list and actually get a better standby battery life -- less than 1% in two hours of standby! If I uninstall greenify, I get about 1% of battery drain per hour of Deep Doze (of course with Universal GMS Doze installed, it's actually way, way worse without the latter)

What you definitely shouldn't do with Greenify on Pie:

- Setting apps to Normal Hibernation instead of Shallow Hibernation (unless you are super low on memory -- may actually increase battery drain and WILL cause lag / context loss on waking hibernated apps)

- Turning on Keep Notifications for Greenified Apps without making sure it's neccessary -- may screw up things that used to work, instead of fixing things that didn't work in the first place

- Greenifying any apps that are part of the ROM -- Pie system apps seem very well tuned to the latest Android energy saving policies, save maybe for Google Play Services

- Setting Greenify itself to Allow Battery Optimization in system settings -- if Greenify is occasionally put to sleep by the built-in power saver (like com.huawei.powergenie.org of Huawei ROMs), it obviously stops functioning

- Setting any of the greenified apps to Do Not Allow Battery Optimization in system settings -- Greenify will by design refuse to hibernate anything whitelisted there

What you definitely should do with Greenify on Pie:

- If you don't just enable some general Doze tricks but explicitly greenify some of the apps by adding them to the list, don't forget to activate GCM Push for Greenified Apps in the Xposed module settings. It's naturally expected that GCM-enabled apps, once hibernated by Greenify, will not wake to push notifications unless that option is checked.

- Even with that option enabled, some GCM-enabled apps may experience notification delay totally unrelated to Universal GMS Doze. Keep an eye on that, de-greenify any affected apps. On some ROMs, messenger apps like WhatsApp or Telegram not only shouldn't be greenified, but will experience issues if not explicitly set to Do Not Allow Battery Optimization in system settings. Make sure they cause excessive battery drain (which they usually don't) before even trying to greenify them. In a typical Pie scenario you are likely to end up disabling all kinds of battery optimizations for your messenger apps instead of trying to greenify them.

Don't expect a fantastic battery life improvement with Greenify on Pie. Currently it's little more than a helper tool for making short work of the occasional rogue app and/or tweaking the overall Doze behavior. If you don't see any improvement at all, this means there are no troublesome third-party apps around and Aggressive Doze / Doze on the Go make too marginal an overall improvement. Then you are lucky and don't need Greenify on Pie at all!