I like this build. A bit pricey and out of range for the casual player, but nice. The only problem I see are the planes walkers... "If two or more planeswalkers that share a subtype are in play, they're all put into their owners' graveyards" Which means you can't have both Jace's in play at once. Planeswalkers don't last long anyhow, so I'd personally ditch a few of the duplicate walkers and add in some different creatures. But that's just me.
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An interesting concept to work around... although I'm not sure how effective it would be. There are a lot of answers for your spells/enchantments. You are essentially milling yourself with the draws when you can only play one land a turn. Seems like there would be a lot of discarding. Note, Safe Passage is the only one that prevents all damage... Everything else wont touch flash damage like Lightning Bolt and Lava Axe.