"Angel's Trumpet" could be a nice killing blow, respectively makes sure that all opponents creatures are tapped, so you can attack him without being blocked and he gets damage every turn. I got the problem against a token deck, while my opponent couldn't attack me, i was not able to break through his massive tokens.
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Linvala, Keeper of Silence would also be nice in this deck.
Instead of "Silence" i would prefer "Orim's Chant". I know it's not realy cheap, but if you copy it with "Isochron Scepter" you may pay the kicker costs every time you activate "Isochron Scepter". So your opponent can't cast spells AND can't attack ;)Source:https://answers.yahoo.com/question/index?qid=20120131094843AA7PIqthttp://www.rarityguide.com/forums/magic-rules-questions/34639-orims-chant-isochron-scepter-kicker.html
With Mesmeric Orb i would also mill my own libary. I prefer Altar of the Brood. With this i just mill the opponent and and usualy more than one card each turn. I will do some modification that the deck will be faster and throw Army of the Damned out, cause i dont't think i will reach the endgame. At the point i have 8 mana, the enemy should already be dead or nearly dead, so this card would be overkill. But if i draw it at the beginning, i have an usless card which i can't play :P