There are no optimal JPEG settings. But since I understand that folks wand to know about how to use JPEG settings and what camera settings to use, I have included several pages of information about those in my upcoming X-E2 eBook.
Luckily, JPEG settings aren't important before you take the picture. You can apply and change them afterwards in the internal RAW converter. So shoot FINE+RAW with the camera's standard settings, then change whatever you want to change later. Try different things. Compare! Don't waste time at Disney worrying about JPEG settings.Have a good time and worry later, when you are at home and have time to review your results.