I tried it at around level 40 the first few times, and it was difficult, because of all the status effects and not being able to do heavy amounts of damage. When you've only chipped away 30 000HP out 330 000 in an hour of battling, it makes you feel glad when you're KO'ed, you know? =P

At level 70, with Gunner + Catnip, it was a cinch.