Answer 1

2 tips:
- go left at the beginning ;)

- in the final room there is a goblet/crown floating against the ceiling.
  (It's a mistake)

Answer 2

I can't figure out how to get S completion on this.

Answer 3

At the beginning of the map go left, there are some gargoyle's (see my replay, it's the 3rd  ).
In the final room there's a mistake, there is a goblet/crown floating against the ceiling, you need to clean that one too, try using one of the gargoyle to reach it with the final combo.

I actually managed to get S,D but on the highscore i still figure with AA.