Ok so I finally beat Imprisoner III and got Imprisoner IV to about half health, but then I died. The problem I have is when he gets me with his mallet and knocks me to the edge of the arena. The camara then unlocks my auto-lockon so I can't really see him, so I'm just dodging every which way with only 1 hp. At that point his spin gets me because I can't see it coming, and having to mash square and the joypad, cycle through my commands to get to Curaga, and frantically hitting L+R to lock on again all at the same time is too much for me. This guy is pretty freaking cheap. The strategy is solid but I can't seem to avoid getting pinned on the edge at least once per battle since the fight is pretty long.

This is all with Ven by the way. Haven't even tried the other characters yet.