I'm trying on the door right before the boss,First that door near riplash has a key very near to his battle area. one of the items you mentioned is the item you need to use to get it. (name is clue already) the other is also needed later the others are optional items for optional rewards. as for the waterworks the combination has always been the same yes light up is on . yes fire is bad
Is it the skeletal key? Because it's not letting me open the door, I tried the other items too just out of sheer chance, but to no avail.
I'm gonna go do the water works lol