It's been a while now since I operated the 732 but I recall that flap 5 was about optimum on runways over 2000m and flap 10 best for shorter runways. Flap 15 climb limits ruled that one out for operations in warmer climates. This is for dash 15 engines. We got our performance data from Air New Zealand but they no longer operate the 732 so maybe you need to look to South America now.
If you PM me I can put you in contact with a guy in Chile who is the full bottle on performance and probably still has a program for the B732 .