I will stand by saying that Towani is one of the greatest final boss themes ever. Honorable mention to Baldr Sky for having an insane final sequence as well

https://www.youtube.com/watch?v=BXZtkVppEhs&list=RDBXZtkVppEhs&start_radio=1
https://www.youtube.com/watch?v=Spj-CWlp6I4