I think your list has some potential, but is lacking some things. First off some cuts, I'd cut all the creatures that you sacrifice on the end step. At first glance it may seem like a cool idea but more often then not either you won't have enough mana to board wipe and play one of them,you'll play one of them get in for 4-7 damage then have no board presence left, or you'll play one and your opponent has a response (i.e. a Counterspell). Also, If you're going to run things like Boros Charm and Rootborn Defenses you might as well take advantage of them by running creature cards that will stay on the field. Only other thing I would say to take out is Elspeth Tirel simply because she's the weakest of the three by far and doesn't help your board state.
Onto some card suggestions, since I recommended you cut six of your creatures, we have six slots opened for new cards. In place of the Elspeth, Gideon Jura and/or Gideon, Champion of Justice. Creature wise, Frontline Medic would be a good addition to combo with any board wipe spells you want to play that turn as well as countering things such as Sphinx's Revelation and the like. To help you finish off your opponent cards such as Aurelia, the Warleader would be a good idea. Another good addition woulds be Sun Titan to fetch Oblivion Ring, Oblivion Stone, Sunforger, as well as others. Those are all the cards I can think of off the top of my head. Feel free to ignore or use any of my suggestions.
1x Zurgo Helmsmasher
Lands/mana
1x Ancient Tomb
1x Arid Mesa
1x Blood Crypt
1x Bloodstained Mire
1x Clifftop Retreat
1x Command Tower
1x Dragonskull Summit
1x boseiju, who shelters all
1x Fetid Heath
1x Godless Shrine
1x Graven Cairns
1x Isolated Chapel
1x Marsh Flats
5x Mountain
1x Nomad Outpost
8x Plains
1x Rugged Prairie
1x Sacred Foundry
5x Swamp
1x Temple of Malice
1x Temple of Silence
1x Temple of Triumph
1x Darksteel Ingot
1x Sol Ring
Artifacts
1x Darksteel Plate
1x Nevinyrral's Disk
1x Oblivion Stone
1x Sunforger
1x Worldslayer
1x Champion's Helm
1x Swiftfoot Boots
1x lightning greaves
1x Gift of Immortality
1x Indestructibility
1x Oblivion Ring
1x Spectra Ward
Sorcery
1x Akroma's Vengeance
1x Armageddon
1x Austere Command
1x Blasphemous Act
1x Catastrophe
1x Damnation
1x Day of Judgment
1x Demonic Tutor
1x Devastation
1x Diabolic Tutor
1x End Hostilities
1x Extinguish All Hope
1x Grim Tutor
1x Cataclysm
1x Jokulhaups
1x Obliterate
1x Planar Cleansing
1x Rout
1x Wrath of God
instant
1x Boros Charm
1x Enlightened tutor
1x Condemn
1x Faith's Reward
1x Hatred
1x Deflecting Palm
1x Fated Retribution
1x Oblation
1x Path to Exile
1x Rootborn Defenses
1x Swords to Plowshares
1x Vampiric tutor
1x Archetype of Aggression
1x Boros Battleshaper
1x Desolation Angel
1x Iroas, God of Victory
1x Bearer of the Heavens
1x Desolation Giant
1x Magister of Worth
1x Serra Ascendant
1x Silverblade Paladin
1x Stoneforge Mystic
1x Stonehewer Giant
1x Tajic, Blade of the Legion
Planeswalker
1x Ajani Vengeant
1x Elspeth, Knight-Errant
1x Elspeth, Sun's Champion
1x Gideon, Champion of justice
Onto some card suggestions, since I recommended you cut six of your creatures, we have six slots opened for new cards. In place of the Elspeth, Gideon Jura and/or Gideon, Champion of Justice. Creature wise, Frontline Medic would be a good addition to combo with any board wipe spells you want to play that turn as well as countering things such as Sphinx's Revelation and the like. To help you finish off your opponent cards such as Aurelia, the Warleader would be a good idea. Another good addition woulds be Sun Titan to fetch Oblivion Ring, Oblivion Stone, Sunforger, as well as others. Those are all the cards I can think of off the top of my head. Feel free to ignore or use any of my suggestions.
1x Magus of the Disk
1x Emeria, The Sky Ruin
2x plains
1x decree of pain
1x In Garruk's Wake
1x Ajani's Presence
1x Arc Runner
1x Ball Lightning
1x Blistering Firecat
1x Hell's Thunder
1x Hellspark Elemental
1x Mageta the Lion
1x Odric, Master Tactician
1x Spark Trooper
1x Elspeth Tirel
1x boseiju, who shelters all
1x cavern of souls
1x vampiric tutor
1x lightning greaves
1x enlightened tutor
1x Sun Titan
1x frontline medic
1x Desolation Angel
1x Iroas, God of Victory
1x Hatred
1x Deflecting Palm
1x Spectra Ward
1x Cataclysm
1x Champion's Helm
1x Swiftfoot Boots
1x gideon, champion of justice