Ferencvaros has experience and quality but is at risk after losing in the Champions League. Betis is facing Krivbass, who is weaker, so they have good chances to win. Anderlecht should easily defeat their opponent. Besiktas is facing Lugano, who was already eliminated by Fenerbahce, so they may win away. And Chelsea, after a defeat in the league, will be motivated to win as they shouldn't have two losses in a row. In general, Ferencvaros and Lugano are at risk of losing, the other teams are likely to win.
I think Ferencvaros will defeat Borac Banja Luka. The Hungarian team is stronger, motivated, and playing at home. Ferencvaros has experience in European tournaments, while the Bosnian team lost in the previous round. I expect a comfortable victory for the home team.