The rates might be the same as TDS but being that they drop all 4 you can go months worth of named without seeing the drop your actually after. To me thats awful. They have never been a guaranteed drop even when they could drop 2. You could kill 10 of those harder named and not see a single ps or you could kill massive amounts of named and get 50 of every other ps but the one you want. To me thats awful.