The best accessories you should play around with are:

Earrings: 18ACC/18CRT/13DET/9SS -or- 9ACC/18CRT/13DET/18SS (Latter usually comes out on top)
Rings: 18ACC/18CRT/6DET/19SS -and/or- 9ACC/18CRT/12DET/19SS

Bracelets and Necklace are extremely situational.