Quote Originally Posted by Formalhaut View Post
Aeronite and Ereshkigal in FFXIII: LR. They were very technically demanding and required a very precise strategy to succeed. Ereshkigal is probably the tougher of the two due to you having to attack it in the air, and air attacks in this game are tricky to maintain.
Ereshkigal is actually the weakest of the optional bosses. If you don't have a high enough damage output for Aeronite, it'll just fly away eventually. Then there's Bhunivelze + which is more difficult than both of those bosses. The only boss I haven't beaten in LR is Aeronite Chaos mode; sooooo much hp .