Its a bit vague on what happens when you kill the mucker. Do the bonuses caused by the drums stop once the mucker is killed?
Also, is this cards a type-0 and should be "world"
Hopefully it will be made a lot clearer shortly when they release the v2 of quests.
Until then, the effects of the FD rolled during setup stay active as long as the Mucker is alive. When you kill him, the effects stop.