In general:
- parts will print great with 0.5 mm extrusion width.
- layer height could be 0.2, 0.25 or even higher.
- infill of 20% will make it
However, some parts may benefit for some special settings.
Have a look at you G-code files after slicing (I recommend gcode.ws), layer by layer, and try to identify any issues.
If found, take the respective part separately and try to tune the settings for it.