Given the troll camp only drops 2 items per day and you need 44 of them you may not have time to craft enough materials to complete upgrades, therefore you may not earn enough music notes to get that prize. And sparkling mines are a bit erratic with the number of required items to complete that craft either. But doing faerie dire, daily chests collection and craft some items in atrium could be worth the effort.
Sorry I should have written 22 troll camp drops.