My friend kind off plays a deck like that except his main combo is

2x Mindlash Sliver
1x Necrotic Sliver
1x Pulmonice Sliver
1x Basal Sliver
1x Dormant sliver

Its pretty much sac the mindlashes to the basal to get up the mana and keep putting them on your deck with Pulmonic then drawing them with Dormant. Repeat until you have enough mana then just destroy all there permanents. But if you get a second Dormant out its a bonus.

Also for the whole wrath of god/Damnation put in a pulmonic then you can just stack you deck with the detroyed slivers.