Video to achieving the "No damage" medal on the final mission "Ouroboros" with the White Phantom. I used a max level Silvertail Radiance with the skill Flash Ray equipped and a lvl 19 Darkshoulder Chaos as my wingman.
Thanks to Valik from Xbox360achievements.org for creating a written guide. Which you can find here: http://www.xbox360achievements.org/forum/showpost.php?p=6132626&postcount=6
