So this deck is a pretty interesting start and I actually really like it! You've certainly got a good start towards a competitive PVP deck going, but you don't have enough copies of your key cards.
Key cards in this deck are Bone Wall and Sanctuary. Between the two, it's hard for the opponent to deliver meaningful damage to your face. The added benefit of Sundials helps you buy time for your CC to come out when you're getting flooded by your opponent's creatures, and the hourglass lets you dig through your own deck. Also, the FFQ is pretty nice for breaking with, so overall this is pretty strong indeed!
But back to the problem with your key cards - you only have one copy of Bone Wall and one copy of Sanctuary. With the importance of these cards, you almost certainly want at least 3 of each in the deck. If you can stabilize faster, the Heal card probably shouldn't be necessary. With only one mindflayer, you might have some trouble answering a Psiontal, as RoF + Oty is your only real answer right now besides Sundials (oh and lightning). It wouldn't be a terrible idea to include one/two Emerald or Reflective Shields.
Nova is also not that great in a deck like this, I'd trade those out for more QPs (nova is burst quanta, and you prefer sustained quanta). Adding a mindgate or two to this deck is also actually pretty useful, it gives you another source of damage if you want to win via damage.
A Pulverizer and a miracle are two rares you might want to add (up to 2-3 of each) if you have them - they'd do well here.
All of that said, this deck isn't the best grinding deck, as its core idea is slow but steady wins, and grinders often prefer speed to winrate.
If you want a grabbow, however, for Arena and such, this deck should be available to you - trade in Vamp Stiletto for Arse if you don't have one.
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