so i had the fun of going and doing the story arc on the weekend. i took in my disco tamer with a dread mare. while pitting my mare against the Exodus and resing it for about the 20th time i decided to try some barding. tried to drop a disco on it, no go. not discord-able. so i launched the masteries on it and wow, it actually started stripping chunks off him! AND i got a scroll. so not sure if people have been trying the masteries on the new mobs as they come out, but they seem to work pretty good on them!