Looking at it from the Standard environment,
Phena Leads Defense and
Unblocked Madness spring to mind, but only because they're from my mind.
The side note of mill is being able to control the board, which will mainly depend on what you're facing in your meta. Bulk creatures calls for kill, while Hexproof will need some indirect answers. Further, a big focus is to maximize the amount of mill you get per mana cost.
As it stands, you have a fist full of mill, and are short on control.
Wall of Frost is my work horse for convincing creatures to leave me alone. Vice listing the multitude of possible answers, consider what you have.