Central Balkan Mountains/National park, June (1 Viewer)

I am visiting the Central Balkan mountain range in Bulgaria in early June, and will have a few days to bird.

The excellent birdsinblugaria.org has some stuff on the species I can expect, but I was wondering if anyone could offer any specific gen for the following birds:

Imperial Eagle
Saker Falcon
Semi-collared Flycatcher
Rock Partridge
Levant Sparrowhawk
Sombre Tit

Any information would be welcome, as would recommended sites nearby.

The people which I know go into eastern Rhodops e.g. Madscharovo.
Imperial Eagle
Levante Sparrowhawk
Sombre Tit
are there.