MTG Salvation

While the deck has been great so far, there are some cards that aren't working. Chromeshell Crab is really slow, and I can't help there are better cards to have that Orim's Thunder and Dismantling Blow. If you have any ideas for cards that should/shouldn't be in here (For inclusions, keep them cheap. Yes I know i need a Force of Will, but Im not dishing out that kind of $$ for EDH. Sorry.)

Edit 6/22: Looking through my binder I found Thieves' Auction. Dreams of playing this, taking Zedruu first, and then letting the board state get all out of wack, except im drawing around 5+ cards a turn sounds incredible. I also want to work brand in here, if i can. On another Note, Orim's thunder now has my repect, as it has 2-for-1ed for me many times. Dismantling blow should most likely still be replaced, though.
+1 Thieves' Auction
-1 Chromeshell Crab

Edit 6/24: I got a Taniwha! So that went in. Also, I took Archmage Ascension out for something.... Ah, thats right, for a Glen Elendra Archmage. For now, because of its uselessness so far, Elixir of immortality is coming out for a different Trinket mage tutor target: Relic of Progenitus. Given my meta, it should prove usefull.
+1 Taniwah
-1 Pilgrim's Eye
+1 Glen Elendra Archmage
-1 Archmage Ascension
+1 Relic of Progenitus
-1 Elixir of Immortality

Edit 6/26: I got to use Relic of Progenitus in a recent game, and it made the dredge player so mad he hated me out of the game immediately. I've decided to take this deck in a less grief-y direction, as the idea of the deck is to look innocent and stand behind soft walls like propaganda until you can nuke players at will. Thus, i'm putting in a gem recently found on the Zedruu thread created by fivecolorjunk located here, Palliation Accord. Yet another "don't attack me!" Sweet.
+1 Palliation Accord
-1 Relic of Proginetus