I'm still playing! It's a bit longer than I expected for a $15 game, incredible value.
I just defeated Crepusculum, and in case you forgot who that was:
What a difficult battle on Hard difficulty! Initially I was getting frustrated because I could barely get any attacks in, so I spent about half an hour killing enemies for XP in order to level up a bit more and experimented with different strategies. I learned a lot from this battle, in particular the importance of effectively switching party members in and out. Basically, you want to sub your star players out when the enemy is up to attack and put "meat shields" in instead to absorb the hit. Then, when your party members are in the clear and it's their turn to attack, you put your star players (these players can be different based on the vulnerabilities of the particular enemy) back in to do the damage.
This is a great combat system, one of my favorites in an RPG. I still feel like I have a ways to go to mastering interrupts.