The Tyrant updated his Mythic walkthrough with a monsterous twelve videos. More, he's also updated his Legendary guide for those (like me) who don't have the patience to crank the dial up to 11. If you're into a side of pain and suffering with your elite campaign play, you definitely want to click on the link below to get briefed by the best.
Mythic Difficulty Guide: Tip of the Spear (and more!)