I'll read the entire topic again this evening, but for now: below is a part of the output from the "pmset -g log" command.
2015-11-30 05:49:47 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(367 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 05:49:47 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000ae8 [System: PrevIdle]
2015-11-30 05:49:47 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000ae8 [System: PrevIdle]
2015-11-30 05:49:48 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000aec [System: PrevIdle]
2015-11-30 05:49:48 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:93%) 30 secs
2015-11-30 05:49:48 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms
2015-11-30 05:49:48 +0100 Kernel Client Acks Delays to Wake notifications: [SSP4 driver is slow(msg: SetState to 3)(381 ms)] [AirPort_Brcm4360 driver is slow(msg: SetState to 2)(403 ms)] [com_apple_driver_AppleUSBCardReaderDriverNub driver is slow(msg: SetState to 2)(628 ms)] [PEG0 driver is slow(msg: SetState to 2)(1082 ms)]
2015-11-30 05:49:48 +0100 Assertions PID 4516(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:01:43 id:0x0x100000ade [System: SRPrevSleep kCPU]
2015-11-30 05:50:18 +0100 Assertions PID 52(powerd) TimedOut InternalPreventSleep "Network wake delay proxy assertion" 00:00:29 id:0x0xd00000aec [System: PrevIdle SRPrevSleep kCPU]
2015-11-30 05:50:18 +0100 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:93%) 195 secs
2015-11-30 05:50:18 +0100 Assertions PID 4539(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:00:30 id:0x0x100000aee [System: No Assertions]
2015-11-30 05:50:20 +0100 Wake Requests [*proc=mDNSResponder request=Maintenance inDelta=3212] [proc=powerd request=TCPKATurnOff inDelta=20573]
2015-11-30 05:50:20 +0100 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1810 ms)]
2015-11-30 05:53:33 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(367 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 05:53:33 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b03 [System: PrevIdle]
2015-11-30 05:53:33 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b03 [System: PrevIdle]
2015-11-30 05:53:33 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000b04 [System: PrevIdle]
2015-11-30 05:53:33 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:93%) 30 secs
2015-11-30 05:53:33 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms
2015-11-30 05:53:33 +0100 Kernel Client Acks Delays to Wake notifications: [SSP4 driver is slow(msg: SetState to 3)(383 ms)] [AirPort_Brcm4360 driver is slow(msg: SetState to 2)(401 ms)] [com_apple_driver_AppleUSBCardReaderDriverNub driver is slow(msg: SetState to 2)(645 ms)]
2015-11-30 05:53:34 +0100 PM Client Acks Delays to DarkWake notifications: [AirPort configd plug-in is slow(462 ms)] [IPConfiguration is slow(469 ms)]
2015-11-30 05:54:03 +0100 Assertions PID 52(powerd) TimedOut InternalPreventSleep "Network wake delay proxy assertion" 00:00:29 id:0x0xd00000b04 [System: PrevIdle SRPrevSleep kCPU]
2015-11-30 05:54:03 +0100 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:93%) 508 secs
2015-11-30 05:54:04 +0100 Wake Requests [*proc=mDNSResponder request=Maintenance inDelta=3215] [proc=powerd request=TCPKATurnOff inDelta=20349]
2015-11-30 05:54:04 +0100 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1054 ms)]
2015-11-30 06:02:30 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(367 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 06:02:30 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b18 [System: PrevIdle]
2015-11-30 06:02:30 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b18 [System: PrevIdle]
2015-11-30 06:02:31 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000b1c [System: PrevIdle]
2015-11-30 06:02:31 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:93%) 30 secs
2015-11-30 06:02:31 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms
2015-11-30 06:02:31 +0100 Kernel Client Acks Delays to Wake notifications: [SSP4 driver is slow(msg: SetState to 3)(381 ms)] [AirPort_Brcm4360 driver is slow(msg: SetState to 2)(402 ms)] [com_apple_driver_AppleUSBCardReaderDriverNub driver is slow(msg: SetState to 2)(628 ms)] [PEG0 driver is slow(msg: SetState to 2)(1072 ms)]
2015-11-30 06:02:33 +0100 Assertions PID 4571(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:08:53 id:0x0x100000b13 [System: SRPrevSleep kCPU]
2015-11-30 06:03:01 +0100 Assertions PID 52(powerd) TimedOut InternalPreventSleep "Network wake delay proxy assertion" 00:00:29 id:0x0xd00000b1c [System: PrevIdle SRPrevSleep kCPU]
2015-11-30 06:03:01 +0100 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:93%) 226 secs
2015-11-30 06:03:03 +0100 Wake Requests [*proc=mDNSResponder request=Maintenance inDelta=3215] [proc=powerd request=TCPKATurnOff inDelta=19810]
2015-11-30 06:03:03 +0100 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1988 ms)]
2015-11-30 06:03:03 +0100 Assertions PID 4592(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:00:30 id:0x0x100000b1e [System: No Assertions]
2015-11-30 06:06:46 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(366 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 06:06:46 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b37 [System: PrevIdle]
2015-11-30 06:06:46 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b37 [System: PrevIdle]
2015-11-30 06:06:47 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000b3b [System: PrevIdle]
2015-11-30 06:06:47 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:93%) 30 secs
2015-11-30 06:06:47 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms
2015-11-30 06:06:47 +0100 Kernel Client Acks Delays to Wake notifications: [SSP4 driver is slow(msg: SetState to 3)(382 ms)] [AirPort_Brcm4360 driver is slow(msg: SetState to 2)(403 ms)] [com_apple_driver_AppleUSBCardReaderDriverNub driver is slow(msg: SetState to 2)(630 ms)] [PEG0 driver is slow(msg: SetState to 2)(1082 ms)]
2015-11-30 06:07:17 +0100 Assertions PID 52(powerd) TimedOut InternalPreventSleep "Network wake delay proxy assertion" 00:00:30 id:0x0xd00000b3b [System: PrevIdle SRPrevSleep kCPU]
2015-11-30 06:07:17 +0100 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:93%) 298 secs
2015-11-30 06:07:19 +0100 Wake Requests [*proc=mDNSResponder request=Maintenance inDelta=3213] [proc=powerd request=TCPKATurnOff inDelta=19553]
2015-11-30 06:07:19 +0100 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1945 ms)]
2015-11-30 06:12:14 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(367 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 06:12:14 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b4e [System: PrevIdle]
2015-11-30 06:12:14 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b4e [System: PrevIdle]
2015-11-30 06:12:15 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000b52 [System: PrevIdle]
2015-11-30 06:12:15 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:92%) 30 secs
2015-11-30 06:12:15 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms
2015-11-30 06:12:15 +0100 Kernel Client Acks Delays to Wake notifications: [AirPort_Brcm4360 driver is slow(msg: SetState to 2)(349 ms)] [SSP4 driver is slow(msg: SetState to 3)(382 ms)] [com_apple_driver_AppleUSBCardReaderDriverNub driver is slow(msg: SetState to 2)(625 ms)] [PEG0 driver is slow(msg: SetState to 2)(1077 ms)]
2015-11-30 06:12:18 +0100 Assertions PID 4625(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:05:21 id:0x0x100000b46 [System: SRPrevSleep kCPU]
2015-11-30 06:12:45 +0100 Assertions PID 52(powerd) TimedOut InternalPreventSleep "Network wake delay proxy assertion" 00:00:30 id:0x0xd00000b52 [System: PrevIdle SRPrevSleep kCPU]
2015-11-30 06:12:45 +0100 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:92%) 271 secs
2015-11-30 06:12:47 +0100 Wake Requests [*proc=mDNSResponder request=Maintenance inDelta=3212] [proc=powerd request=TCPKATurnOff inDelta=19225]
2015-11-30 06:12:47 +0100 PM Client Acks Delays to Sleep notifications: [com.apple.apsd is slow(1984 ms)]
2015-11-30 06:12:48 +0100 Assertions PID 4647(AddressBookSourceSync) Released PreventUserIdleSystemSleep "Address Book Source Sync" 00:00:30 id:0x0x100000b54 [System: No Assertions]
2015-11-30 06:17:16 +0100 Kernel Client Acks Delays to Sleep notifications: [AppleThunderboltNHIType2 driver is slow(msg: WillChangeState to 2)(367 ms)] [PEG0 driver is slow(msg: SetState to 0)(902 ms)]
2015-11-30 06:17:16 +0100 Assertions PID 87(mDNSResponder) Created MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b63 [System: PrevIdle]
2015-11-30 06:17:16 +0100 Assertions PID 87(mDNSResponder) Released MaintenanceWake "mDNSResponder:maintenance" 00:00:00 id:0x0xd00000b63 [System: PrevIdle]
2015-11-30 06:17:16 +0100 Assertions PID 52(powerd) Created InternalPreventSleep "Network wake delay proxy assertion" 00:00:00 id:0x0xd00000b64 [System: PrevIdle]
2015-11-30 06:17:16 +0100 DarkWake DarkWake [CDN] due to ARPT/Network: Using BATT (Charge:92%) 30 secs
2015-11-30 06:17:16 +0100 HibernateStats hibmode=3 standbydelay=10800 rd=257 ms