While you won't get the annihilator trigger off of Emrakul, the Aeons Torn, you'll still be attacking with 15 power in the air, and the Emrakul will go back to your hand afterward, to attack again if your opponent happens to survive
Recommended number is between 75 - 100
Its also a 1-mana spell, at least, and sometimes you can accelerate your game plan just fine
One of the best new solutions for this combo is the Felidar Retreat enchantment, which creates a 2/2 cat token for each land entering the battlefield
Fey Steed Fey Steed, 2WW, is a good support card when it comes to the attack phase
Then, during each of your upkeeps, you gain life and draw cards equal to the number of your permanents that your opponents control