Stamina in HP Growth Calculation

I would like to try and make it state-based, to avoid the following problem: it very strongly incentivizes the player to focus exclusively on raising Stamina during early levels, to the detriment of other stats, because if you don't you're basically throwing HP away.

I thought about that and came with two "solutions": Either it become part of the game and you plan your hack accordingly (to some extent) or you limit very much stamina boosts in early game. Another thing could be modifying the formula based on the level (like 3 formulas: lvl 0-30, 31-60 and 61-99). It's something I could look into but requires a lot more divisions and additions manipulations.

I'm not sure what you mean by state-based...