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Since white doesn't seem to be doing much, I'd consider moving to red instead. That way you could work in Atogs and Myr Retriever. Something Arcbound to the Atog, move the counters to another critter, sac the Retriever to buff the Atog further and bring the saccrified Arcbound whatever back to your hand. Prototype Portals are also dirt cheap and let you do the same tricks. Red also lets you play Volt Charge for removal combined with a counter proliferate.
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And while Cranial Plating seems nice in theory, I think in practice Fireshrieker might do more damage, and Whispersilk Cloak may guarantee it gets through.