i got these setting from http://wiki.phoenixviewer.com/firestorm_avatar_physics
looked and found the body shape that's close to my av and with a lil tweaking they look great.
this is my Shape and settings
Height: 2.11m (6'9"œ)
Breast Size: 52
Breast Buoyancy: 23
Breast Cleavage: 23
Hip Width: 50
Butt Size: 50
Belly Bounce: 6, 5, 5, 39
Breast Bounce: 19, 13, 19, 84
Breast Cleavage: 11, 11, 16, 79
Breast Sway: 5, 13, 6, 50
Butt Bounce: 6, 5, 5, 39
Butt Sway: 12, 11, 11, 70
Advanced: 16, 12, 16, 7, 7, 10, 10, 11, 12
hope this will help