[Legacy] [Opinions] WUG Sliver Beatdown

Greetings people,

Looking for a little help with a tired old sliver concept deck id like to build for casual dueling with friends. (Who also have sliver decks)
I'm thinking of keeping it a focused Green, White, Blue quick beatdown.  I wanted your opinions on any superfluous cards I may be using and mana curve suggestions.

http://deckbox.org/sets/491322

(Details)
- Casual Play
- Legacy
- Kill Conditions are
        • Overrun with unblockable shrouded flyers
        • Virulent Sliver also adds poison counters to opponents as well
- $300.000 budget max, but I'd like to hear all suggestions anyway

Looking forward to getting some feedback
Thanks.