Maybe I'm being dumb, but how do you defeat the first boss of the Bottomless Gramtoa? The spout. It heals before I can defeat it, and I'm using level 96 character who were reincarnated twice already. It looks like it has a gimic. It says it's looking out for bindings, so I use Lec to bind it, but it doesn't really change the end result. It eventually heals and I'm lost on what to do.
On top of that if anyone has a guide for all the bosses, I'd appreciate it.
Edit: I just was unlucky I guess. Did the fight again and I was able to beat it before it healed. No idea what I did right or wrong, would still appreciate some kind of explanation on how to handle this one.