I didn't use the latest bug-fix. Only the original code that I lifted from GameFAQS.
If it can help, I also ran AstralEsper's restoration patch along with a variety of personal changes made through FFHackster.
Changes included weapon stats, armor stats, class stats, spell stats, monster stats, shop line-ups and relocated treasure chests.
However, I had a back-up IPS with the old combat routine. I patched it over the ROM file and the game worked fine.
I also applied the Dynamic combat routine on a vanilla ROM and I couldn't replicate the issue.
For now, I'm trying a playthrough where I only apply AstralEsper's restoration, equipment stats, class stats and shop line-ups. Sadly, the crash happened at Tiamat's battle so I won't know if it works until the late-game segments.
April 09, 2014, 06:44:10 pm - (Auto Merged - Double Posts are not allowed before 7 days.)
Sadly, even those reduced settings cause the crash. I fought Lich, casting Fire 3 on it and the game crashed immediately. I also tried a quick test where I only applied the Restoration and Dynamic Action patch by themselves. Same results.
The way I see it, AstralEsper's Restoration patch and CaptainMuscle's Dynamic Action patch are unfortunately incompatible.
If you use any spell of Level 5 and above, the game is guaranteed to crash.