I was playing as my life wiz and just beat the plague oni I leveled up and got a new spell quest when I got to moolinda she gave me the quest and guess what I had to do. the plague oni dungeon all over again only minutes after I completed it this is the second time I've had to do a dungeon a second time just after I beat it. So I think that after you beat a dungeon when you do it again you should have the option of going straight to the boss instead of having to do the entire dungeon a second time.