is wingman for you SF or SG/SF?
For SG/SF an outside Focus would gve then more shot, if you just mean the SF i would look where he is strong(if he would probadly got an missmatch under the basket because he is an good inside scorer he would take more shots if you play an inside focus, the same is when he got good outside skills with an outside focus).
But i will look where the opponent is weak, and will play the focus you would score most even if the center scores more then your wingman^^