Derevi EDH!

While I've been working on this for a while, it's still my first EDH deck.

All suggestions are welcome and appreciated , but remember I'm on a budget, I'd be playing original duals if I could.

I'm not currently at my deck so there are a few things I've removed that I can't remember what I switched out for.

If there are any cards from the Commander 2013 preconstructed deck you think I should add back in, I have them all still.

Tappedout version: tappedout.net/mtg-decks/derevi-edh-29-01-14-1/

Commander
{Derevi, Empyrial Tactician}
Creature (27)
1x {Acidic Slime}
1x {AEtherling}
1x {Azami, Lady of Scrolls}
1x {Birds of Paradise}
1x {Blade Splicer}
1x {Chameleon Colossus}
1x {Deadeye Navigator}
1x {Fiend Hunter}
1x {Fleecemane Lion}
1x {Grand Arbiter Augustin IV}
1x {Heliod, God of the Sun}
1x {Jin-Gitaxias, Core Augur}
1x {Karmic Guide}
1x {Kazandu Tuskcaller}
1x {Kitchen Finks}
1x {Knight of the Reliquary}
1x {Lavinia of the Tenth}
1x {Lu Xun, Scholar General}
1x {Mirror Entity}
1x {Mulldrifter}
1x {Phantom Nantuko}
1x {Prophet of Kruphix}
1x {Restoration Angel}
1x {Roon of the Hidden Realm}
1x {Terastodon}
1x {Thragtusk}
1x {Venser, Shaper Savant}
1x {Winged Coatl}
Artifact (10)
1x {Azorius Keyrune}
1x {Bident of Thassa}
1x {Bow of Nylea}
1x {Conjurer's Closet}
1x {Gilded Lotus}
1x {Selesnya Signet}
1x {Simic Signet}
1x {Sol Ring}
1x {Swiftfoot Boots}
1x {Thran Dynamo}
Sorcery (4)
1x {Green Sun's Zenith}
1x {Terminus}
1x {Time Warp}
1x {Wargate}
Enchantment (4)
1x {Control Magic}
1x {Darksteel Mutation}
1x {Oblivion Ring}
1x {Land Tax}
Instant (13)
1x {Bant Charm}
1x {Counterspell}
1x {Cyclonic Rift}
1x {Disenchant}
1x {Fated Retribution}
1x {Krosan Grip}
1x {Path to Exile}
1x {Plasm Capture}
1x {Rapid Hybridization}
1x {Ray of Revelation}
1x {Selesnya Charm}
1x {Swords to Plowshares}
1x {Unexpectedly Absent}
Planeswalker (3)
1x {Garruk, Primal Hunter}
1x {Jace, the Mind Sculptor}
1x {Venser, the Sojourner}
Land (37)
1x {Azorius Guildgate}
1x {Bant Panorama}
1x {Command Tower}
1x {Evolving Wilds}
1x {Faerie Conclave}
5x {Forest}
1x {Gavony Township}
1x {Graypelt Refuge}
1x {Glacial Fortress}
1x {Hallowed Fountain}
1x {Hinterland Harbor}
5x {Island}
5x {Plains}
1x {Saltcrusted Steppe}
1x {Seaside Citadel}
1x {Sejiri Refuge}
1x {Selesnya Guildgate}
1x {Simic Guildgate}
1x {Sunpetal Grove}
1x {Temple of Enlightenment}
1x {Temple Garden}
1x {Temple of Mystery}
1x {Temple of the False God}
1x {Temple of Plenty}
1x {Treetop Village}