I've been playing around with the most recent version of this rando, and for whatever reason, the Black Mage doesn't appear to ever gain HP on standard hero stat randomization. My first game, they (in slot 4, which I ultimately think doesn't matter) stayed at 25HP to level 10 before I re-randomized to see if it had something to do with the class or the slot, and on a second short playthrough, it occurred again, to a black mage in slot 3 for the first couple levels.
I've been playing around with the most recent version of this rando, and for whatever reason, the Black Mage doesn't appear to ever gain HP on standard hero stat randomization. My first game, they (in slot 4, which I ultimately think doesn't matter) stayed at 25HP to level 10 before I re-randomized to see if it had something to do with the class or the slot, and on a second short playthrough, it occurred again, to a black mage in slot 3 for the first couple levels.