I believe that Trophy Baits, should be replaced with a tier based bait system. Then you craft those baits with the trophy stuff like before. In this case, Rex Arm would be replaced with "Basic Trophy" and crafted with a rex arm or spino sail. Spino Sail would be replaced with Advanced Trophy, crafted with Yuty or Rock Drake Feathers. Then you have the Wyvern Claws in one. And the other versions of the trophies could be modified by server owners to include various bits of other stuff. Default would probably just take multiple trophies that you already know exist. I could come up with a full list of costs for each thing if you want, but it'd make this system more editable really.