To Awl
I'm a private pilot. And personally anytime I fly from Moscow I stick to "Luftwaffe". . Sc*ew Aeroflot/Airfrance ( exuse moi ). Even though my friends do fly for Afl.
As for conditions - up to 10K Pounds that what they get as Captains on A330
And you can pay local income tax of 13% only, if you are in here 180 days+ as my Dutch friends do.
Don't know how that would be calculated if you are flying abroad twice a week, but presumably tac declaration submitted in Moscow will spare you from one in London/Paris/Ottawa.