Sac to Win (Casual)

The entire point of this deck is to cheat Emrakul out of its mana cost by using Body Snatcher. Play Body Snatcher, discard Emrakul, and before Emrakul's ability triggers sac Body Snatcher to play Emrakul for free. Once it's out, you pretty much win. That being said, I know a deck based on 1 combo tends to be extremely weak in the long run, so I added a couple other possible routes of play. Coffers and Sol Ring and Dark Ritual are classic mana accelerators, which allow me to get the combos going early and perhaps to play my mana-heavy creatures without having to cheat them using Body Snatcher. The big creatures are to discard for Body Snatcher, assuming I don't have Emrakul in hand. Demonic Tutor and Rhystic Tutor help me to get the missing cards I need. In case I am mana low, I can use the "you may sacrifice 3 creatures instead..." abilities to play big creatures, as all my common creatures cost very little mana. To add to the combos, almost every creature I have has a sac ability, that way I can be sure to get that Body Snatcher insta-sac. Dimir House Guard is used either as an amazing blocker or to get Body Snatcher into my hand.

My problem so far with this deck is it can be very mana hungry, and although it performs well one or two counterspells
or return cards will cripple it. Granted, I can use Dimir House Guard to get another Body Snatcher if it is countered, but the return cards really hurt. I put Diabolic Edict to give me a couple more turns, and to mitigate the damage I get dealt in the first 2-3 turns, but swarm decks such as goblin decks really hurt.

Any ideas? I would like to know if there are other small sacrifice creatures that are perhaps better for this deck, or if Murderous Redcap would work well in it? Or maybe if there are any other HUGE monster creatures that can benefit from the Body Snatcher/sac combo.