rank them from 1-5 and 1 is the hardest bosses
1. Magnus (Hard Mode)
2. Chaos Pink Bean
3. Hillia (Hard Mode)
4. Cygnus Empress
5. Von Leon
that my opinion
1. Magnus (Hard Mode)
2. Chaos Pink Bean
3. Hillia (Hard Mode)
4. Cygnus Empress
5. Von Leon
that my opinion