I will agree with others that the AOH is just fine as it is. IF it had to be updated for a higher CR set of battles, then keeping the 3rd battle would be fine for a 1st fight. On another note, is it possible or feasible to add incorporeal undead into the game? That and level drains would be a factor for several set of battles in the game. If this has been addressed, please ignore. Just was not worth the time to search.