The progression curve kinda sucks, after the 1st wheel you lose everything and your insight is stuck to 0. (7 ascensions).
It would be less annoying if at least the forked souls would not lose their bonus when you are levelling them up.
Also have some scaling in the techniques bonus, most of them will never pay off in 90 minutes of life = Bonus x5400. It is not worth to increase them higher than this value.