remove the poisons, they only absorb deck space which can be used for better things. Try using two skull shields, or dusk mantle. Instead of Arsenic, Use two vampire daggers, they work well to stall a bit when used with a shield. Also, some cloaks are a nice option to protect your creatures (as well as protecting your other permanents) Some steals would be useful as well, since nearly every shield means an autoquit for this deck otherwise.