Thanks for the feedback. Ah, it may be peaking at times... I've worked hard on it this time though, but I still have troubles with mixing and masterising properly. x]
Also, I only used a part of the main melody of "Somnus", a song featured in the trailer of FFvsXIII, and I wrote everything else around it.
Shimomura's style [Kingdom Hearts series] is pretty epic when it comes to battle themes, and I just imagined it as a battle theme in general, not thinking about it being a boss/normal, etc. But I'll be careful about not "exaggerating" when it comes to normal battles next time ! =3
More importantly, I'll try to work on my own battle theme style. x]