When I started playing, I was concerned that having all the Dungeon Abilities active would make the game too hard at the beginning. However, with the rate at which I accumulated experience, I was able to unlock Hunter Abilities relatively quickly. I made it to the Decromancer six times before defeating it. To me, you've just about hit the balance of challenge vs growth perfectly. I found that progression felt a little too quick, so instead of having Mastery active from the start, I made it a 5 experience unlock ability. That felt like an achievable first accomplishment and made the first round a little more challenging, but not overly so. I am absolutely a fan of this game and look forward to future iterations.