Nah man, i believe the plot is heading in this direction. Mila will enter the floating castle in hopes of ending Amber. The angelic gear will save us from a great deal of trouble, because once it's equipped, the vampirism status will never bother us again. After a huge time of grinding on the dangerous locations of the castle filled with new and dangerous enemies we will accend to a room that resembles a throne room, we will see Amber siting on her throne. After a short dialogue, we will charge at her and the battle will start.