It looks fun not all that competitive but still fun your in red and green why not play firewake sliver he seems good and he is better then fury sliver IMO.
You're right in going RGB, those are the best colors for slivers. I would play slivers that costed less though and instead put in utility cards like Dark Confidant, Char, Rift Bolt, definetly Firewake Sliver and Ghostflame Sliver. Also, 24 land is too much for an aggressive deck.
Private Mod Note
():
Rollback Post to RevisionRollBack
Getting the last word does not mean that you win the argument.
I agree with zyrakris, RGB is the way to go, my decklist in the link below, is an aggro RGB sliver deck, but has all creatures as slivers, and removal for anything my slivers can't handle. http://forums.mtgsalvation.com/showthread.php?t=56149
4 Sedge Sliver
4 Basal Sliver
2 Fury Sliver
4 Two-headed Sliver
4 Gemhide Sliver
2 Might Sliver
4 Demonfire
4 Spinneret Sliver
4 Farseek
4 Blood Crypt
4 Overgrown Tomb
4 Stomping Ground
4 Karplusan Forest
1 Suluforous Springs
3 Llanowar Wastes
Swing with slivers then sac all to Basal Sliver and Demonfire them out. Probably Horrible but yeah But I like building decks, bad or no