For those wondering,
https://www.youtube.com/watch?v=7orMIfJx-uw
a FZ low vis approach into BTS, from cockpit. As can be seen here, it's Single CH all the way until the AP disconnect. Also what's interesting is the VSD on both sides, Pm and Pf.
Also, as I read somewhere, Rostov is captain's airport only, so capt was PF i'd guess.