At least 3 to start with, then slowing down from there.
First playthrough will be on Hard, to get used to the new mechanics and see how each unit preforms and such.
Second playthrough will be on Lunatic, using my knowledge from Hard to get through it.
Third playthrough will be on Lunatic+, where I use everything I've learned so far and knowledge on the net to completely break the game. --- http://us.battle.net/wow/en/character/black-dragonflight/Arpandaday/advanced http://i.imgur.com/lPu0J.gif