I think that was the level I cleared Murdaw's castle.
If you can't Evac, I think you can walk outside when you get to the castle and Zoom out.
It's a tough battle and I forgot how I figured it out. There's definitely a lot of tight timings, I remember. Maybe you need the right items or equipment or something. IMO this is the hardest battle in the game.
Also don't forget about using defend. Unlike other RPGs, defend reduces damage by around half which is key to defending against magic and bosses that have two turns.
(If you overlevel, it might cause problems later on with class changing since your level will be too high to get battle credit to gain experience in a class, and class levels are wayyyy more important than experience levels.)
[quote name='blueshinra']Started Persona 3 FES yesterday (The Journey). Not digging the lack of direct control over party members in battle (i.e., the one part of DQ4 I wish every other turn-based JRPG developer hadn't been influenced by). Hope I get used to it, because I like everything else about the game so far.[/QUOTE]
I fixed this for you, lol.
Ah, the days of yelling at the NES because Cristo wants to cast Defeat on a boss. They fixed it in DQ5, it's amazing how it's still a problem in other games 15 years later.