Just beat the game. Holy [parasitic bomb] the final boss kicked my ass. Is that thing even possible buster only? I didn't stand a chance until I started using Brandish.
Beat MN9... took me several tries on the Final Boss until I can beat the first form without taking any damage at all. I was doing alright for the Second Form, but I started to take damage and had to pop a healing item as I was getting close to beating it. The first time I "killed" the boss, the boss popped up from below me and I died because I had low health as I didn't know it was going to do that and I had to reset it.
That was the final phase and after it is the clear... I was ticked when I learned this when I avoided it the second time.
I used Battalion for that fight and it made the fight easier. So much trial and error, but it became easier as I learned the pattern. Though I hated the Xel Blocks in the Final Stage once I figured them out it made it easier to travel through the level, no hand holding but sheesh... I enjoyed the game and now Ray's Story Mode is left.
Boss hits hard and have the Healing Items RESET after each death made this harder at first, but it came into place once I know what to expect. Still difficult regardless.