Saephis
Virtuous
Taking the below excerpt from the 0.9 'packet':
With the 'shortish' version of every Backstab and Weapon Proficiency costing progressively more to purchase, with the intent of lowering damage.
Lastly, sources of persistent damage (Weapon Proficiency and Backstab) become harder to purchase as you buy more of them. Each one takes one additional “turn in skill” (either Critical Attack or Back Attack respectively) for each Weapon Proficiency or Backstab you’ve already purchased, up to the 10th purchase (it never costs more than 14 Critical Attacks or Back Attacks respectively). This helps close some of the gap between high-level players and low-level players, and gives additional reason to spread build expenditure around instead of just buying Weapon Proficiencies or Backstabs at high levels.
With the 'shortish' version of every Backstab and Weapon Proficiency costing progressively more to purchase, with the intent of lowering damage.