We got a group going that are going to be getting these near impossible to get DLC achievements on saturday. I made a little (or well big) kind of poor layout to use in terms of order of how we will be getting the achievements. We are looking specifically for people that have all 3 DLC and have multiple controllers.
Here is the thread we are working with: https://forums.halowaypoint.com/yaf_postst120282p4_Defiant-Anniversary-Achievement-Team.aspx, if you are interested post in there and post that you are, what DLC you have, and how many controllers. You also might want to look at the poorly designed layout.