I'm entertaining the idea of using this system but I don't really like for my PCs to level up and change power level much. I would rather have a level set at which to prepare and play.

Which level in Black Hack would be better for an experience of medium power level, no hit point bloat neither too fragile PCs, to hack and get the most out of the system?

For example in D&D 5e the sweet spot is 5th level. 2nd or 3rd level for beginner characters/players. Not worthy going higher than around 9th level.

I don't have the time to run a campaign from 1st to 10th level, not even if we levelled up every session. I need a nice level to play directly at.