This thread has a tournament result with deck lists where I came in second with Unpowered Eldrazi:
I really enjoy playing the deck. And although a lot of the cards are "givens" it's fun to tweak it to my tastes and style and what I think will work well.
I wouldn't play any artifact with an activated ability so that the Null Rods are as one-sided as possible.
Since you have some time before the event I would really recommend Jason Jaco's book available from Eternal Central. I'm sort of a newb to Vintage and it really helped me get started with the deck.
No spheres for me. The way it's setup it's not really a prison deck (unless falling into Null Rod/Crucible/Strip somehow). More of a very aggro deck with some disruption.
I've played it in a few tournaments and have sideboarded in the Newlamog several times but never cast it ... and I think the World Breaker has only worked once. But I like the feeling of having "an out" to almost anything ... but then again I might get rid of it.
The main reason for the ESG's was to be able to play out from under a Workshop's turn one sphere, which has worked several times. They will help with the World Breaker too though. For example Workshop player goes land, moxen, sphere or similar and I can go Ancient Tomb, discard ESG, Null Rod which can work out against Shops.
I've had mixed success maindecking Sol Ring and Mana Crypt. Sometimes you get a hand with a Crypt and a Null Rod, and feel like a silly goose. But sometimes you need a t1 Thought-Knot Seer and the mana rocks do the heavy lifting there.
I've also toyed around with Mockery of Nature in place of the World Breaker, works ok if you're saccing a Matter Reshaper for the Emerge cost, and still KOs Moat on cast. Other times, it can sit in your hand (but that happens plenty with World Break anyway, it seems for me). I also run ESGs, and desperately want the modo promos in paper foil haha