Please Help

[Mactitioner]

Repeat Performance 60 cards, 0 sideboard 2 {Island} 4 {Forest} 2 {Glacial Fortress} 4 {Sunpetal Grove} 2 {Plains} 2 {Gavony Township} 2 {Razorverge Thicket} 4 {Hinterland Harbor} 22 lands 4 {Avacyn's Pilgrim} 3 {Master Splicer} 4 {Birds of Paradise} 4 {Thragtusk} 4 {Nephalia Smuggler} 3 {Wing Splicer} 2 {Somberwald Sage} 3 {Blade Splicer} 3 {Vital Splicer} 30 creatures 4 {Conjurer's Closet} 4 {Lead the Stampede} 8 other spells Sideboard Notes:

[Mactitioner]

I would love some input on this deck. I played this deck this past Friday. I did okay I won about half my matches. If you have any suggestions I would love them.