It really is mostly guess, not knowing much about the rest of the world. I do think it helps for clarity to use player roles instead of overall rating in the user setting tab.
I had a soph PG rated at 88 in a guard heavy (at the time) Naismith a few years ago who was at the bottom of the board. Left early, and was the very last pick. Would have been a senior this year, if I had somehow been able to keep him.