This is a really interesting suggestion that uses level scaling like Nightmare Dungeons but for the Open World.
I’ve been wanting more of a challenge when leveling a fresh character. Before reaching ND there is no real way to increase the difficulty (ie: no scalable content). This solution would be great. It would also allow for running content other than ND.
The problem I can see though is that since this occurs in the open world, your efficiency goes down the more you scale. Another player without scaling could come in and clear that challenge in mere seconds before you have any chance of engaging with it.