I used Yarmolenko in a Bundesliga Squad as RF in 4-3-2-1 Formation. For his height he is very agile and fast enough to keep defense away as I used the Hunter style. If you use the first touch dribbling with him you get an enormous first speed boost. Once you are in the position to sweep into middle of the pit you got the ball on his strong foot. There it doesn't matter if you are in the box or out of it. He is able to score from any position with his strong foot.
With his weak foot you are not able to cross the ball in the box if you are running with the ball. You have to stop and sweep to the left foot.Also with his height you are able to score headers.
For me he works pretty well as I love to cross in from sides. Also with his skill moves you are able to keep the defense away.
+ Strong left foot
- weak foot