From memory, slept in:
Checkpoint hotel at CP1, 1hr
Tried to bivvy but to cold in near Swiss border, 20-30min of shivering
Hotel at CP2 (didn't need to but saddle issues were killing me), feckin' hours!
Hotel in Verona (nice), ~3hrs?
Hotel in Pordenone (nice), ~3hrs?
Powernap in bus stop maybe in Bosnia or just before entering Bosnia?
Motel Kiwi in Bosnia (check self in at 3am), ~3hrs?
Bivvy at parcours start in Pluzine, Montenegro as everything was closed, ~3hrs?
Hotel Macedonia, just before Greek border, 2hrs?
Bus stop sleep somewhere in Greece, no idea time
Bivvy in bus stop somewhere else in Greece, ~3hrs?
I had a similar mix, but it looks like I generally slept a bit longer than you.
My strategy was to either ride or sleep and do v. little else so I think I had longer night stops and spent more hours riding than most people, but my riding speed was lower than others I encountered, ie they kept overtaking me!
Also as well as night sleeps I also had naps when I got the dozies through the day - on benches, in parks, in fields, etc. I decided I would stop when I felt that there was a risk of nodding off while riding. So I probably did that every other day.
My stops were:
Bivvied at a campsite by the Loire that I'd used before - reasonable sleep, 4-5 hours
Bivvied by the road somewhere in Burgundy - c.3 hours, didn't sleep much and got cold, and wet from lots of dew in the morning
Hotel at Neuchatel (5 hours) great sleep
Bivvied at about 1700m altitude on the way up the Gothard Pass. 2 hours - best sleep I've ever had.
Hotel by Lake Garda, c.5 hours - good sleep
Bench in a town somewhere in N. Italy about 50km on from Passo Giau. 1.5 hours, hardly slept a wink.
Bivvied in bus shelter in Thunderstorm near Rijeka (Croatia) - c.4 hours. OK sleep.
Hotel at Bihac in Bosnia, c.5hours, good sleep
Hotel at Kiselic, 25km before Sarajevo, c.5hours, good sleep
Bivvied in bus shelter 25km past Skopje, c5 hours, crap sleep (was looking for hotel and discovered one 200m further on in the morning)
Bench somewhere in northern Greece. c.1.5 hours
Bench in Turkey about 80km short of the finish, c 1.5 hours.