It needs boros?
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I like the deck, but I think there are too many lands. 22-23 lands should do the trick for your deck, as only 6 cards cost 5 mana +. With less lands, you will still get the mana you need to play your spells, but also have an increased chance to draw your spells when they are needed in the midgame. Taking 7-8 lands out would also lower the size of your deck to ~60.
I find that decks with only one strategy are easily shut down. I tried to make this deck so that there are multiple cards that win the game for me.