Just wanted to share the list I got to Champion with. It's a relatively standard Red-Green list, using the aggressiveness of red with the late game bombs of green. I went with this as there was a lot of aggro, so wanted to match their aggression but up the late game. I especially like the born-agains as recurring road-blocks, and the volkov heavy just shuts 3 lanes down with the armor, and applies counter pressure at the same time (personal favourite of mine).
The deck is not build around the mythics, but they are all very important. Each of them has won me games along the way for sure. I think the stairway is one of the most important ones, given the rush package and the amazing reach it gives (14 with wyvern and wings when the road is clear).