Why so many Planeswakers, you could have a fine deck with only a few.
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I like the infinite mana combo with 2x Myr Galinizer and a couple of other mana producing myr's into a game winning fireball.
You could also add Call to Mind and Nemesis of Reason if you can find more combos that would be awesome, this is a good start on a mill deck.
If you try blue and black mill you can add mind funeral and other I'll get back with more good mill cards
Why not 4 V Teacher's and 4 time of heros, good other spells though
Put Four catacombs and four tome scour, I like Hedron Crab
Infect's all the rage all you need is more spells to boost you small infect creatures and you will win quickley
At first I didn't like it but I realized the power of your Life Gain + Mana Acceleration after a look. Try adding 4x Sunpetal Grove it's a great carn for this deck. Also look for some good G/W multicolered's.
I haven't seen a giant deck in a while cool - nice job