If you have HB Premium, I would do the following:
Inventions twice
Buffalo Bills
Cafe Mickey
Auberge de Cendrillon (this may only be available for evening meal at the weekend depending on park opening times)
California Grill - not a character meal but superb dining and a good use of premium vouchers
Personally, and this is only my opinion, I wouldn't waste premium vouchers on the Lucky Nugget as the food is not of a comparable standard, although I believe at some point this may be upgrading to a Premium choice so I guess it depends when you are going. Definitely don't use Premium vouchers on the tea party - perhaps get an early sitting as an extra for the characters and use your Premium vouchers for California Grill that night.