The only 30/30 I have is the Tinkering Master Craftsman. I have not seen any killer percentages listed on these BOD reward Talismans. I have seen a 30/30 Alchemy Bonus but those are the only two I know of on Great Lakes. My favorite killer Talisman was the 100% Giant Beetle since they try and molest me while I am studying the Solen Hives.