its a five color sliver deck that i am looking for some ideas on. its about two weeks old and is showing promise. the people i play against have weak decks and so do i. i am just looking for ideas my budget is about 50$ a month. most of my friends play tribal decks so things like coat of arms wont work.

lands:
4x plains
5x forest
5x swamp
5x mountain
3x island
1x urborg volcano
1x elfhame palace
1x darigaaz's caldera

artifact:
1x paradise mantle

spells:
1x dark ritual (dont really use it )
1x arrest (gets rid of heavy hitters or great ability cards)
1x renewed faith (keeps me alive, if im doing good i just cycle it and gain two life)
1x untamed wilds
1x journey of discovery
1x guided passage ( i love this card )
1x attrition

creatures:
2x sliver overlord
1x sliver queen (have another one coming in mail)
2x spined sliver
3x hunter sliver
3x blade sliver
1x magma sliver
1x talon sliver (lifesaver)
1x essence sliver
1x ward sliver
1x plated sliver
1x toxin sliver
1x crypt sliver (i know i need more)
2x spectral sliver (weak i need something to put in their spot)
2x winged sliver
1x shifting sliver
1x synapse sliver
1x horned sliver
2x brood sliver
2x muscle sliver
1x root sliver
1x birds of paradise (the only non sliver)

The deck is really creature heavy. i like it it plays very well. i dont know what i am gonna do with the second sliver queen that im getting it might not go in. i wanna trade the spectral slivers for crypt slivers. i am open to any suggestions. the biggest problem i face is that the slivers are not very big and have trouble with the heavy hitters. sliver queen and brood sliver help get tokens out to gang block with. i was thinking about putting the earthcraft / fertile ground / sliver queen combo in once i get the second sliver queen, but im not sure if i want to. i have the four earthcrafts so thats not a problem. i just dont like the cheeseyness of having an infinite combo. i prefer games that last for 5 min or more. i look foreward to hearing what you have to say.