I agree, the "Max All" is def not optimal, but a few things to consider:
a) there is a certain upgrade later that makes Body Parts not consume the Ash they cost
b) I do like the idea that the "max all" button is not the most efficient way to play the game, I want to reward players who try to min-max (pun intended) and strategize the best order of buying
But broadly speaking this has been mentioned a few times and been on my mind, but sadly there is no "definitive" solution to this. I do like the idea of shuffling the order around, but any work on that isn't really high up my priority list rn, (for the reasons outlined above) but that doesn't mean I won't go back and improve it. Thanks for the feedback tho, hope you still enjoy the game!