caldybtch

you should check out my r/g eldrazi deck http://www.mtgvault.com/ViewDeck.aspx?DeckID=168441. u prolly wont need the might of masses or stampede, if you concentrate on getting eldrazi out and fast making them stronger wont really help, since they dont have trample they can be blocked easily, its the annihilator that really kills the opponent

bloodghast maybe? also id look at using less 2's of everything, less consistancy when u do that

grand architect might work in there too

imo blacksun zenith is terrible in an infect deck, most infect creatures have very little toughness, all its gonna do is kill ur guys too, also instill infection is a terrible card, theres ones that do better counters for less, try virulent disease, also corpse cur and core prowler are some good infect artifact creatures as well

you should add terramorhpic expanse/evolving wilds, itll trigger the hedron crab abilities twice, id also add haunting echoes and sideboard your leyline of the void imo and guard gomzoa is good for preventing damage/infect. i have a deck similiar to this one tough http://www.mtgvault.com/ViewDeck.aspx?DeckID=166384

its mainly just there to give my core prowlers vigilance or reuse my grindclocks, otherwise they are completely useless, and id rather have a higher chance of getting my clocks out

myr welders can imprint as well, cost three to play its a 1/4 , only downside is having to wait till turn 3 to use liquimetal's ability

also four crushes and take out the shatters, or sideboard them if you think you might need them, but crushes cost 1 less to play

idea i didnt think of before. drop the heroes and add in manic vandals, destroys target artifact when u play it

if ur gonna use the crabs ya gotta add more fetch lands, out in 4 evolving wilds, id only get 1 vensers journal really, if you want the journal to count your gonna need to do more drawing in my opinion, but it can come in handy, dont forget about some nihil spellbombs to exile opponents graveyard, prolly better for sideboard than anything. archmage ascension is a good idea to get the cards you want, but since its a permenant id only put two in there, also to make use of that id find some more draw cards, maybe drop the vivisections for a preordain, itll give u one more turn to put a quest counter on archmage, instead of combining vivisection with oculus.