More Frequent Desperation Attacks

I would second that.  I’d love to include this patch in a blend but most other FF3 patches are dependent on v1.0 of the base rom.  Good stuff...I’m also curious about increasing the range of near fatal from 1/8 of max HP to 1/3 of max HP.  Does the value only increase/decrease via. multiples of two?

Correct. You can only divide by 2 using the shorthand code that is used here. The code listed in the original post is 1.0 code. If you enter it via a hex editor, rather than using an IPS patch, it will work. If you want near fatal status to be set at 1/4 HP, like in Divergent Paths, edit C2/453B from 4A to EA. (The code "EA" is called a NOP, short for No Operation.) In your rom, this is rom address 2453B on an unheadered rom, or 2473B on a headered rom.