Have you found that any CC (Oty, EE, Congeal + Shockwave) have given you trouble? I like the deck, but with limited defenses against creature control, I'm curious to how you deal with it.
Given that you are a mono 
, you can always rewind your pharaohs if they're ever in danger, which is nice, but it still slows you down considerably on scarab generation.
Just my thoughts, but a good looking deck! 40 cards is fine since you've included 3 Electrum Hourglasses and 2 Precogs, which essentially makes this a 38 card deck
It's obvious that a mono deck has limited arsenal against CC, but with eternity to rewind otys/ulitharinds/squids and 6 Pharaohs I would recommend to play scarabs as often as you can, then play pharaohs with any remaining quanta and only then rewind damaged pharaohs if you still have quanta remaining. You can afford to lose a few pharaohs as long as they manage to produce a few scarabs before dying, and rewinding a pharaoh to play him again not only is extremely expensive, but also slows down your card drawing.
Against otys on the other hand, if you don't have eternity yet to rewind them, you can try to play pharaohs without playing scarabs. Then, when you have a number of these and you finally draw an eternity you can try to produce more scarabs than they can eat while rewinding otys so that you will finally have more scarabs than their HP.
Against quinted otys you should do the trick with producing a single scarab each turn and rewinding it, then when you have enough scarabs in your hand play them, produce a few more and they should be too big to be eaten.
Of course the exact strategy depends on your opponent (eg. if they have rain of fire or plagues you need to be careful, that's where precog comes in handy), but as long as you manage to produce at least 6-7 scarabs you should be able to win against any CC, because rewinding scarabs is much cheaper than rewinding pharaohs
I'll have to test that deck much more though, because I only played it a few times, but I'm quite busy at the moment. If anyone is trying this deck and sees any problems (that can be solved) please comment.
How about replacing the precogs with 2 electrum hourglasses. That will speed up the deck a little bit, considering you have all that time quanta.
You don't need that many hourglasses, because this deck does not rely on combos that need a number of cards to work. Whether your starting hand has a pharaoh or two, an eternity, a turtle shield, an hourglass or a few SoGs, all is good as long as you have enough towers too, which shouldn't be a problem.
The deck in fact is very heavy on quanta because pharaohs, eternity and hourglasses all have an ability you want to use each turn. In fact hourglasses only help if you need some card like eternity or turtle shield, or you need some more pharaohs due to creature control, but if you already have the cards you need you can usually spend your quanta better on scarab production and rewinding rather than playing additional hourglasses
Also (at least in an upgraded deck) precogs are not a card to be replaced, but rather added almost for free. With almost half of the deck being time towers, when you play a precog it's very probable to draw a tower, so it's almost as if the card was free. Precogs are here not to speed up the deck, but to gain strategic information about your opponents hand.
EDIT:
I tried the deck with an addition of 6 upped sundials and it seems to help quite often. You cannot use them to draw additional cards, but you can heal, use hourglasses, produce scarabs, eat creatures, protect a creature from gravity pull, permafrost or turtle shield... etc.
