The 4-4-1-1 definitely seems to be working, Ronaldo doesn't like a second striker next to him, which they had for a while since Talisca left. Now they know what they are doing and get someone who is like a advance forward type of thing where Felix plays. That is why the problem is looking like gone at the moment and they could be doing much better at the time and we should be expecting them to do a lot better and could get a greater result.
A 4-2-3-1 formation is also suitable if Ronaldo isn't particularly interested in a second striker alongside him. In a 4-4-1-1 formation, Mane and Coman also play on the left and right flanks, but not as the main strikers, given Ronaldo's dominance in those positions, as in Al Nassr's last two matches.
I see Coman, Mane, and Felix as players Ronaldo prefers as his partners, making it easier for him to score.
It was a beautiful sight in the Super Cup semifinal when Ronaldo provided an assist to Felix even though Ronaldo was only one-on-one with the goalkeeper.
The final against Al Ahli, with Al Ahli's 5-1 victory over Al Qadasiya, was a good final that would make for a great and balanced match.