Same comment here as before - too many different cards with small numbers of those cards. The land here is good though, and I like 3x Predatory Sliver . Not sure why Wall of Swords is here.

Dump all non-Sliver creatures. You'll notice them being suddenly more consistent.

KrazyCaley, Wall of Swords is a temporary defense for flying until I get winged sliver.

Spinneret Sliver is worth including as anti-air rather than either Wall of Swords or Winged Sliver as it is off-color

If you are willing to go out of Standard, I'd actually suggest something like 4 each of Predatory Sliver , Muscle Sliver and Sinew Sliver , with Might Sliver and Bonescythe Sliver to top off. Akroma's Memorial gives you almost all the abilities you need, and the 7 mana needed is nothing once you have either Manaweft Sliver or Gemhide Sliver . The reduction to 2 color makes it even more consistent too, though Naya is perfectly fine for Slivers.

Mutavault should be pretty good in a Sliver deck if you can get your hands on some. 2 would be ideal.

I don't mind going over 60 cards.