I think you should narrow down what the deck does. Say your two win conditions would be door or mill, seems good. The deck looks like it just lacks consistency at this point, otherwise I like it.
I thought about making a defender deck with mill thrown in. I didn't think of the Axebane Guardian + Door to Nothingness condition. It's a fun touch that I may add in. I do agree with A_Person, that maybe taking out one condition to add strength to another (it's light on mill and C and D are vulnerable to removal).
Beautiful deck, I'd personally take out the mill conditions and replace it with removal, say take out the Increasing Confusion and Doorkeeper for, let's say, a playset of Dissipate . Mill tends to take too long if not focused and also get very boring.
Personally, I'd keep only the mill and the door conditions, but put in a Galvanic Alchemist for infinite mana when paired with Axebane Guardian with three other defenders out. It allows for a turn ~5 door activation and a turn 4-5 infinite mill with Increasing Confusion or Sands of Delirium .