Might be a stretch, but splashing blue for things like Mana Drain, Cancel, and other counter cards to protect your spells. Or some way to get protection from blue.
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I don't know any off hand but I'd try to find some cards to mana ramp quickly so you can get those exepensive enchantments out before you get overwhelmed.
I play tested some of those briefly and I found myself not having the land in hand to play it every turn, but what would you replace for them?