My thoughts...
If you are looking to keep it standard, don't listen to me, and just don't read this post.
However, the mill deck I run for modern/casual play consists of cipher control/mill cards such as Paranoid Delusion and Hands of Binding plus Trepanation Blades on Invisible Stalkers. Then I have some Guard Gomozoas for some defense. Thats the core.
Additional cards include
Traumatize
Corrupted Conscience
Consuming Aberration
Psychic Intrusion
Mind Funeral
Dissipation Field
Encrust
Sleep
Jace, Memory Adept
Nighthowler
Thats the idea, its just the meanest mill/control you can find plus some damage too, all unblockable via the stalkers.