I wouldn’t mind Kulu on the right, but I have to say with Ronaldo as left winger, I prefer a right footed RW to provide width.
Saw some games from Kulu where he played at AM and he seems very comfortable in exploiting the spaces where a striker should be. Those positional changes (striker drops back, AM goes forward) are one of the main principles with Total Football from the ‘70s. Obviously different times now, but I’d like to see him and Dybala work close together, mainly because Dybala would do great when he drops back a bit.