vs D&T:
+1 Echoing Truth, +3 Pyroclasm, +2 Through the Breach, +2 Blood Moon
-1 Misdirection, -3 Spell Pierce, -1 Gitaxian Probe, -2 Force of Will, -1 Griselbrand

vs RUG:
+2 Blood Moon, +2 Defense Grid, +1 Echoing Truth, +1 Pyroblast, +1 Flusterstorm
-1 Gitaxian Probe, -2 Dig through Time, -4 Force of Will

On the draw I might keep the Digs and don't board Blood Moon. It might be right to board out 2 Probes and keep in 2 Forces, but I feel I have enough protection with Defense Grid, Pyroblast, Flusterstorm, Misdirection and 3 Pierce. Plus, I like Probe a lot in this matchup to know which of his counters (Daze, Pierce, Flusterstorm, FoW, REB) he has, if any.

vs Reanimator:
+1 Pyroblast, +1 Flusterstorm, +2 Grafdigger's Cage, +2 Through the Breach, +1 Jace, +1 Echoing Truth
-1 Gitaxian Probe, -1 Girselbrand, -1 Mountain, -1 Misdirection, -2 Dig through Time, -2 Show and Tell

If you play against the slower version without Lotus Petal, it might be correct to keep in DTT and board out 2 Petals instead.

vs Miracles:
+2 Through the Breach, +1 Jace, +1 Echoing Truth, +1 Pyroblast
-1 Mountain, -2 Lotus Petal, -1 Misdirection, -1 Gitaxian Probe

vs Stoneblade
UWR ("Golddigger"): +everything except 2 Blood Moon, 2 Grafdigger's Cage
-2 Lotus Petal, -1 Mountain, -2 Gitaxian Probe, -1 Emrakul, -4 Force of Will,
-1 Misdirection

Esper: +1 Jace, +1 Pyroblast, +2 Through the Breach, +3 Pyroclasm, +1 Echoing Truth
- 1 Mountain, -2 Lotus Petal, -2 Force of Will, -3 Gitaxian Probe

If you have RR you can start it in your turn, with only R you have to wait until your opponent's end of turn. Then you activate Sneak Attack, putting Emrakul into play and enter your turn. You give your opponent priority at the end of your main phase. If he bounces Emrakul then, you regain priority, use your second R / or the untapped R from EOT again to put Emrakul back into play. If your opponent bounces him in response to the Annihilator trigger he doesn't lose life, but you can just kill him on the following turn, because his board will be wiped and you get to keep Emrakul in hand.