Coiling Oracle is great

I have my own Mimeoplasm Deck (http://tappedout.net/mtg-decks/the-mimeoplasm-31-12-13-1/). Mesmeric Orb is extremely useful early and late game. Body Double also helps with creatures in the grave. Also Whispering Madness is really handy as well. Cards in which I would take out are Dimir Keyrune , Simic Keyrune , and Darkblast . The keyrunes do not do you enough since you already have a lot of ramp, and Darkblasts's only function is just the dredge. Hope this helps!

Darkblast has gotten rid of so many mana dorks for me early game, not to mention has been useful as a dredge. might take it out though. Mesmeric Orb would be nice in here. I need to update the deck...Whispering Madness + Invisible Stalker are now part of it