"Instant Death" over-rides "Miss if prot. from ailments"

Regarding SwdTech, the crux of the issue with its usefulness is how slowly it charges. There's a patch that fixes that, which I've found helps tremendously in re-balancing the skill: http://slickproductions.org/ff6patch.php...ch%20Gauge

Regarding your issue, one option is to utilize unused bits in special byte 3 and somewhere in the monster properties. This method would require you to interrupt the hit calculation to perform a check for these two bits, but it would work. Someone else may be able to come up with a more elegant solution, though.