-man2man never.
-Long passing I prove when I have mixed passing+ attacking mentality and I see that he have more chances and dominates me, then I prove very defensive mentality + long passing, if I have chances or depending of how I see I prove 10 minutes this and 10 long passing+attacking mentality.
When I change the orders very often I see how the bar of possession change in some sense or the new orders give me more stability.
Good luck.