Stamina in HP Growth Calculation

I assume that by "state based" he means that for having a specific Stamina stat, your HP is increased statically by a certain amount, rather than your HP increasing more upon level-ups.

Yeah, you could maybe do like:

HP addition = level * stamina / 16 (or / 8)

For a level 10, 30 and 60 with 40, 55 and 70 stamina:

10 * 40 / 16 = 25 HP
10 * 55 / 16 = 34 HP
10 * 70 / 16 = 43 HP

30 * 40 / 16 = 75 HP
30 * 55 / 16 = 103 HP
30 * 70 / 16 = 131 HP

60 * 40 / 16 = 150 HP
60 * 55 / 16 = 206 HP
60 * 70 / 16 = 262 HP

Double everything up if you divide by 8 instead. However this seems to less beneficial for characters with high stamina, maybe to the point of reducing it to a neglectable stat. This is valid whether you use the level of a table number which would also be not really variable for characters in the same level range.