So...........

last time I played FF8, I levelled up like crazy, eventually got up to level 100 for everyone, and whooped the $hit outta everyone.

If I shouldn't level up, as the fiends won't level up either, what about the bosses? Do their levels NOT rise if mine don't?
i remember bosses like Cerberus, Bahamut, and of course ulitma weapon being hard because i was at low levels. Is this just because there were certain abilities my gfs hadn't learned, or do I have to be up to high levels to defeat certain bosses, given than I want to do all the side quests?