Quote from Zombie ShakespeareLooks like a solid start.
You may want to test out AEther Spellbomb and Executioner's Capsule as additional targets for Trinket Mage. Cards like Vedalken AEthermage, Scrivener, Death Denied, Merchant Scroll, and Mystical Teachings are great in UB control builds like this as well. Finally Ghostly Flicker is amazing mid and late game. Especially in combination with Archaeomancer and the like.
Quote from HeWhoKilledDeathFrom Innistrad, I like Traitorous Blood. Especially copied with Riku it allows for an alpha strike with an opponent's own creature(s).
Quote from TheOrangePetGotcha, makes good sense. Have you made any changes in the last few weeks? Perhaps something else from Innistrad has wow'd you? In your experience how many times do you need to recast Riku to get the game state to the point where you start X'ing people out of the game? Also, have you played against other pauper or non-pauper commander decks and how did it compare against whichever?