Channel is banned, so you could start with removing that one. Prophetic Prism could be Expedition Map . Insist should be Crop Rotation , and can go to the sideboard. It's a dead card except against control.
For reference, here is my 12 Post deck:
Is there enough ramp in here? I feel like you can turn a win out a lot faster than this deck allows.
|Date added||6 months|
|Last updated||5 months|