Search:

withouth Coralhelm this deck has no way to deal with a Moat..

this is mono U slivers are 3 colors at least. that's way they have Crystalline and Gemhide (and Wing too)

btw, what do you need flying for? you already have Islandwalk..

my list:

4 Rishadan Port
4 Mutavault
12 Island

4 Silvergill Adept
4 Wake Thrasher
4 Tidal Warrior
4 Cusecatcher