If you look at the pre-season averages the $200K rooks actually are not very appealing or screaming out to be picked, bar Cripps and Salem. Usually I like to push the boundaries of mid rookies but this year I am not sure about going < 4 prem mids (when usually I'd be trialling it by now) because to do so means you flood your midfield with $200K options and, as I said, I am not sure they are there this time.
On Salem, I would see him a must in a 3-7 setup and probably also in a 4-6 one.