I left proximitywake == 1 just to see but even after 8 hours it woke up as normal. One thing I noted was that exactly after 8 hours I got this from pmset:
2018-09-29 00:38:04 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=inactive Using AC (Charge:0%) 28796 secs
2018-09-29 00:38:06 +0200 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1959 ms)]
2018-09-29 08:37:59 +0200 Kernel Client Acks Delays to Sleep notifications: [CodecCommander driver is slow(msg: SetState to 0)(302 ms)] [en3 driver is slow(msg: WillChangeState to 0)(5287 ms)]
2018-09-29 08:37:59 +0200 Assertions PID 183(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00008dc5 [System: BGTask SRPrevSleep kCPU]
2018-09-29 08:37:59 +0200 Assertions PID 1171(cloudphotosd) Released BackgroundTask "com.apple.cloudphotosd.darkwake.sync" 08:00:39 id:0x0xb00008dbd [System: PrevIdle BGTask SRPrevSleep kCPU]
2018-09-29 08:37:59 +0200 Assertions PID 183(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00008dc5 [System: PrevIdle BGTask]
2018-09-29 08:37:59 +0200 AppWakeReason AppWoke:com.apple.bluetoothd Reason
roximity Wake
2018-09-29 08:37:59 +0200 Assertions PID 58(powerd) Created InternalPreventSleep "Assertion to change proximity monitoring state" 00:00:00 id:0x0xd00008dc8 [System: BGTask SRPrevSleep kCPU]
2018-09-29 08:37:59 +0200 Assertions PID 58(powerd) Created InternalPreventSleep "Holding in darkwake for user proximity for up to 1800 secs" 00:00:00 id:0x0xd00008dc9 [System: BGTask SRPrevSleep kCPU]
2018-09-29 08:37:59 +0200 Assertions PID 58(powerd) Released InternalPreventSleep "Assertion to change proximity monitoring state" 00:00:00 id:0x0xd00008dc8 [System: BGTask SRPrevSleep kCPU]
2018-09-29 08:38:00 +0200 Assertions PID 58(powerd) Created InternalPreventSleep "PM configd - Wait for Device enumeration" 00:00:00 id:0x0xd00008dca [System: BGTask SRPrevSleep kCPU]
2018-09-29 08:38:00 +0200 DarkWake DarkWake from AutoPowerOff [CDN] due to XDCI XHC/: Using AC (Charge:0%) 45 secs
2018-09-29 08:38:00 +0200 WakeDetails DriverReason:XHC - DriverDetails:
The machine was still sleeping when I got back to it after ~9 hours but I had that in the log. Ill try and disable proximitywake as well. Playing around with autopoweroffdelay settings as that's the only thing with a default 8 hour setting. Ive changed that to 20 min just to see the results faster.
Im back to just having darkwake selected under boot settings in Clover.