Could you buff the amount of numulite you get from exchanging fossils with the Fossil Collector?
At the moment, it would take you over 100m hunter experience to fully charge the Ancient Wyvern Shield on an ironman account.
Current Rates -
Small Fossil - 100 Numulite
Medium & Plant fossils - 200 Numulite
Large Fossils - 300 Numulite
Rare Fossils - 500 Numulite