I do fumbles in a way that they only get hit by the initial attack. If they had more that 1 attack it just misses.
Im totally down for a planar adventure. Maybe even be hunted by paladins or worshipers of the lady of graves cause hes cheating their god. As for the AP if they ignore it. The freezing winter takes over the world in a sense. But im very down for a mythic adventure. Its 3/4 new players. The more exotic the better.