and its not rare for them to spawn on the surface
Out of this post, You got a single thing right.
You dont need skills on, you dont need for it to be night time, its non existent.
All of this is completely wrong though.
It took me less than 10 minutes to find this guy with skills on at night. In fact, It probably took me more time to take and post the images than it did to find him.
Stop acting like you know everything when you don't. That may seem funny coming from me, But I have proof, And I try not to spread false information.
On a side note, Here was my skill levels
Not even particularly high when all things are considered.