it's good. the quantum denial is fine. xD. though you have SLOW attack, so you might want to be careful with those fractals so you can fractal the vampires.
secondly, you might want to change that vampire stiletto for something like another aether pillar or fractal or vampire like everyone else here said. it will make it a little faster overall..
third and last, change your mark. No, I mean, seriously. because once you start fractaling those devourers, your opponent will have no quantum to even try to kill you. or get near doing it. change mark to aether, because darkness isn't really the biggest need here.
as a result, the deck would go out like this :
(STILETTO - VAMPIRE SWAP.)
5uk 5uk 5uk 5uk 5uk 5um 5um 5um 5um 5um 5uo 5uo 5up 5up 5uq 5uq 5ur 5ut 5ut 5ut 5ut 61o 61o 61o 61o 61o 622 622 622 622
If I played this deck though, I would (naturally of me) take out all of those shields. so my own deck would seem like this :
(MODIFIED VERSION) :
5uk 5uk 5uk 5uk 5uk 5uk 5uk 5um 5um 5um 5um 5um 5up 5up 5uq 5uq 5ut 5ut 5ut 5ut 61o 61o 61o 61o 61o 61o 622 622 622 622
Notice the lack of vampire stiletto, I only changed it because most people don't have it. you can easily change a obsidian pillar with a vampire stiletto, though. also notice that I added more devourers - they are just in case someone rof's everything so you have a spare one ( or two or more) left. notice that the vampires was down to 3 so when I get them I would be ready to play them out at once and quickly.
Obviously the last one is just a idea of mine, and the first one is swaping a vamp stiletto for vampire. they are all just ideas, but might work well.