I really want to like this game, but it seems the makers do everything in their power to make it challenging before play even begins. The rulebook is as confusing as the videos on YouTube.
 
For example...on page 6 of the rulebook under #3 Domains
"Each player takes three cards that are not being used in this game and places them face-down next to his deck."
 
Great...WHERE are these cards supposed to come from???? Is the player supposed to LOOK at these cards or not? If he is allowed to look at them, how should he choose which cards to use? Is it okay to use story cards? Icon cards? Unique cards? Conspiracy cards? Event cards? 
 
C'mon designers, throw us a bone. The rules are supposed to HELP people, not confuse them. We shouldn't need to call in the old gods to decipher rules.   

Well, building a good Silver Twilight mono deck is no easy feat, so, grats for arriving at something that worked well for you so far!
Even if you cut those nine cards, you still have 72 cards, that's almost 50% more cards than the minimum. Unless you have an extremely good reason for such an oversized deck (like planning to mill yourself), your deck will get a lot better by simply cutting the number down to 50.
As it is your deck will suffer from too much randomness: What do you do if you don't draw the Initiate or Ramsdale Brown, or those Eldritch Nexuses? Is there a secondary plan? You also don't seem to have ways to draw additional cards.
 
I've also been wondering about The Locked Door: This is very risky to play since it may help your opponent more than it helps you (you do realize your opponent also gets those extra investigation icons, right?)
 
You also cannot play the Barkeep - I suppose you overlooked the Steadfast requirement?
 
Regarding the Guardian of Dawn: Do you actually have a way to make it Day?