I think you're mana curve is too high, you have too few land, and I don't see much of a purpose for Erebos. Erebos will almost never become a god, and 2Mana 2Life for 1 card is not that efficient in my opinion playing a defender deck, those little pings will start to add up. Other than that I think your card draw approach could work. You might check out my build and let me know what you think...
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I am a new player running a similar deck, I would love to get some feedback about my build and work to improve it. If you are reading this please have a look at my deck, http://www.mtgvault.com/theferretking/decks/defender-mill/