Crystal Veins is fine to use. Often i would hold back a tomb/city for the turn i want to S&T into Omni to prevent getting it wasted. 1 maindeck Boseiju is fine to. I wouldnt have problems with 6-8 u fetch and 6-8 islands along with 3-4 veins and 1 boseiju making a total of 19 lands.
2 Emrakul is on the safe side but 1 is fine to. 2 Emrakul gives you the ability to loop it (thru enter the inf.) and win without having to pass the turn to your opponent.
I am not a fan but LabMan is a wincon to. And it is cheap.

