My den is current hunting level 63. Have tried the Mission Impossible hunts multiple times now and happy to report success several times. For Goldsea suggest a configuration (note there are others that can achieve the same) of wolves and companions such as below that gives you maximum synergy and level increasing your odds to ~56.2%. The food drain is steep and suggest using something less difficult to replace such as glowing mushrooms found by exploring caves in the early levels or farming something like rice which completes in 30min and has high yield once you reach seed level 5. The wait is also long (2 days) however the payoff is generous awarding $50k pebbles and lots of XP points though the experience seems to go unused as your wolves/companions are already maxed to achieve the highest odds. Good luck!
Jocol Level 10 - Blue Shield, Blue Shield, Green Plus
Tawny Rodill Level 10 - Green Plus, Yellow Star, Yellow Star
Kit Level 10 - Blue Shield, Blue Shield, Pink Chalice
Bucher Pandosa Level 10 - Green Plus, Green Plus, Green Plus
Bracchus Level 10 - Red Circle-dot-site, Red Circle-dot-site, Green Plus